1.
Using correct body mechanics helps prevent injuries to both the patient and the health care worker.
Correct Answer
A. True
Explanation
Correct body mechanics refers to the proper use of muscles and joints when performing tasks such as lifting, transferring, and positioning patients. By using correct body mechanics, the healthcare worker can minimize the risk of musculoskeletal injuries such as strains, sprains, and back pain. Additionally, it helps prevent injuries to the patient by ensuring their safety during movement and reducing the likelihood of accidents or falls. Therefore, the statement that using correct body mechanics helps prevent injuries to both the patient and the healthcare worker is true.
2.
Back muscles should be used for heavy lifting because they are strong muscles.
Correct Answer
B. False
Explanation
The statement suggests that back muscles should be used for heavy lifting because they are strong muscles. However, this is not entirely true. While back muscles do play a role in lifting heavy objects, relying solely on them can lead to strain and injury. It is important to engage multiple muscle groups, including the legs and core, to distribute the load and maintain proper form while lifting heavy objects.
3.
Whenever possible, push or pull rather than lift.
Correct Answer
A. True
Explanation
The statement suggests that it is preferable to push or pull objects instead of lifting them whenever possible. This is because pushing or pulling can distribute the force more evenly and reduce the risk of strain or injury to the body. Lifting heavy objects can put excessive pressure on certain muscles and joints, increasing the likelihood of accidents or physical harm. Therefore, it is advisable to choose pushing or pulling over lifting, whenever feasible.
4.
Never operate any equipment unless you have been instructed on how to use it.
Correct Answer
A. True
Explanation
This statement emphasizes the importance of receiving proper instruction before operating any equipment. It implies that operating equipment without proper knowledge or training can be dangerous. Therefore, the correct answer is true, as it highlights the need for instruction before using any equipment.
5.
All manufacturers must provide Material Safety Data Sheets (MSDS) with any hazardous products they sell.
Correct Answer
A. True
Explanation
According to regulations, all manufacturers are required to provide Material Safety Data Sheets (MSDS) for any hazardous products they sell. MSDS contain important information about the potential hazards, safe handling, and emergency procedures related to the product. This ensures that consumers are informed about the risks associated with the hazardous products and can take necessary precautions to protect themselves and others. Therefore, the statement is true.
6.
The Centers for Disease Control and Prevention established the safety standards for occupational exposure to hazardous chemicals.
Correct Answer
B. False
Explanation
The Centers for Disease Control and Prevention (CDC) is a federal agency responsible for protecting public health and safety in the United States. While the CDC plays a crucial role in monitoring and preventing the spread of diseases, it is not responsible for establishing safety standards for occupational exposure to hazardous chemicals. This responsibility falls under the jurisdiction of the Occupational Safety and Health Administration (OSHA), which sets and enforces regulations to ensure workplace safety. Therefore, the statement that the CDC established safety standards for occupational exposure to hazardous chemicals is false.
7.
The Bloodborne Pathogens Standard protects health care providers from disease caused by exposure to body fluids.
Correct Answer
A. True
Explanation
The Bloodborne Pathogens Standard is a set of guidelines and regulations that aim to protect health care providers from contracting diseases through exposure to body fluids. These fluids can contain pathogens such as HIV, hepatitis B, and hepatitis C. By implementing safety measures, such as using personal protective equipment and practicing proper hygiene, health care providers can minimize the risk of infection. Therefore, it is true that the Bloodborne Pathogens Standard helps protect health care providers from diseases caused by exposure to body fluids.
8.
Medicare provides health care for individuals with low incomes and individuals who are physically disabled or blind.
Correct Answer
B. False
Explanation
Medicare is a federal health insurance program in the United States that primarily provides coverage for individuals who are 65 years or older. It also covers individuals with certain disabilities, end-stage renal disease, or amyotrophic lateral sclerosis (ALS). However, Medicare is not specifically designed for individuals with low incomes or those who are physically disabled or blind. Instead, Medicaid is the program that provides healthcare for individuals with low incomes and certain disabilities. Therefore, the statement provided in the question is false.
9.
The Health Insurance Portability and Accountability Act (HIPAA) has provided consumers with more access to insurance and greater confidentiality with regard to medical records.
Correct Answer
A. True
Explanation
The statement is true because the Health Insurance Portability and Accountability Act (HIPAA) was enacted to protect the privacy and security of individuals' health information. It ensures that individuals have the right to access their own medical records and control how their information is used and disclosed. HIPAA also sets standards for the electronic exchange of health information, making it easier for consumers to switch health insurance plans without losing coverage. Overall, HIPAA aims to improve the accessibility and confidentiality of health insurance and medical records for consumers.
10.
Health insurance plans solve health care problems by paying for the total cost of health care.
Correct Answer
B. False
Explanation
Health insurance plans do not solve health care problems by paying for the total cost of health care. While health insurance can help cover a portion of the cost, it does not typically cover the entire cost. Additionally, health insurance plans may have deductibles, co-pays, and limitations on coverage, which means that individuals may still be responsible for a portion of their health care expenses. Health insurance is designed to provide financial protection and assistance with medical expenses, but it does not completely solve the problems associated with the cost and accessibility of health care.
11.
A master's degree usually requires four or more years of work beyond a bachelor's degree.
Correct Answer
A. True
Explanation
A master's degree typically requires additional years of study and research beyond a bachelor's degree. This advanced level of education allows students to specialize in a specific field and gain a deeper understanding of their chosen subject. Therefore, it is true that a master's degree usually requires four or more years of work beyond a bachelor's degree.
12.
Continuing education units (CEUs) are required for all health care careers.
Correct Answer
A. True
Explanation
Continuing education units (CEUs) are indeed required for all health care careers. CEUs are a way for health care professionals to stay updated with the latest advancements in their field and maintain their knowledge and skills. These units are typically earned through attending workshops, conferences, and completing courses that are relevant to their profession. By requiring CEUs, health care organizations ensure that their staff members are continuously learning and improving, which ultimately leads to better patient care and outcomes.
13.
National Health Care Skill Standards specify the professional regulations that must be followed in ONLY nursing careers.
Correct Answer
B. False
Explanation
The statement is false because National Health Care Skill Standards do not only apply to nursing careers. These standards apply to a wide range of healthcare professions and outline the regulations and requirements for professionals in those fields. Nursing is just one of the many careers that must adhere to these standards.
14.
It is important for students to obtain information pertinent to an individual state when checking requirements for health care careers.
Correct Answer
A. True
Explanation
Obtaining information pertinent to an individual state is important for students when checking requirements for health care careers. Each state may have different licensing and certification requirements, scope of practice regulations, and educational prerequisites for various health care professions. Being aware of these state-specific requirements is crucial for students to ensure they meet the necessary qualifications and can pursue their desired career path in the health care field.
15.
For most health care careers, graduation from an accredited program is required before, certification, registration, and/or licensure will be granted.
Correct Answer
A. True
Explanation
In the field of healthcare, it is generally necessary to complete an accredited program before obtaining certification, registration, or licensure. This ensures that individuals have received the necessary education and training to practice safely and effectively in their chosen healthcare career. Without graduation from an accredited program, it is unlikely that these credentials will be granted. Therefore, the statement "For most health care careers, graduation from an accredited program is required before certification, registration, and/or licensure will be granted" is true.
16.
Which of the following HCP (health care providers) organizes, manages, and assumes the risk of a business.
Correct Answer
C. Entrepreneur
Explanation
An entrepreneur is an individual who organizes, manages, and assumes the risk of a business. In the context of healthcare, an entrepreneur would be responsible for starting and managing a healthcare-related business, such as a private clinic or a healthcare technology company. They would take on the financial and operational risks associated with the business and make strategic decisions to ensure its success. This role is different from other healthcare providers mentioned in the options, such as a music therapist or an obstetrician, who primarily focus on providing direct patient care rather than managing a business.
17.
Which of the following HCP is a medical doctor specializing in pregnancy and childbirth?
Correct Answer
C. Obstetrician
Explanation
An obstetrician is a medical doctor who specializes in pregnancy and childbirth. They have extensive knowledge and training in managing the care of pregnant women, including prenatal care, delivery, and postpartum care. They are skilled in managing complications during pregnancy and childbirth, such as high-risk pregnancies, multiple pregnancies, and fetal abnormalities. Obstetricians work closely with other healthcare professionals to ensure the health and well-being of both the mother and baby throughout the pregnancy and delivery process.
18.
Which of the following HCP is a medical doctor specializing in diseases of children?
Correct Answer
D. Pediatrician
Explanation
A pediatrician is a medical doctor who specializes in the care and treatment of children, specifically focusing on diseases and medical conditions that affect children. They have extensive knowledge and training in the unique needs and developmental stages of children, and provide medical care, diagnosis, and treatment for a wide range of pediatric conditions. They play a crucial role in promoting the health and well-being of children, and work closely with families to ensure the best possible outcomes for their young patients.
19.
Which of the following HCP is a medical doctor specializing in disorders of the mind?
Correct Answer
C. Psychiatrist
Explanation
A psychiatrist is a medical doctor who specializes in disorders of the mind. They have completed medical school and have additional training in psychiatry. They are able to diagnose and treat mental illnesses using a combination of therapy, medication, and other interventions. Unlike psychologists, who have a doctoral degree in psychology, psychiatrists are able to prescribe medication and have a more medical approach to mental health.
20.
Which of the following HCP is a medical doctor specializing in X-rays and radiation?
Correct Answer
B. Radiologists
Explanation
Radiologists are medical doctors who specialize in interpreting and diagnosing medical images, including X-rays and radiation. They have extensive knowledge and training in using imaging techniques to identify and treat various medical conditions. Electrocardiograph technicians, radiologic technicians, and electroencephalographic technologists are not medical doctors and do not specialize specifically in X-rays and radiation.
21.
Which of the following HCP is a dental specialists for diseases of the gums, bone, and structures supporting the teeth?
Correct Answer
C. Periodontist
Explanation
A periodontist is a dental specialist who focuses on the treatment of diseases related to the gums, bone, and structures that support the teeth. They are experts in diagnosing and treating conditions such as gum disease, gingivitis, and periodontitis. Periodontists are trained in performing surgical procedures such as gum grafts, dental implants, and bone regeneration. They work closely with general dentists and other specialists to provide comprehensive dental care to patients.
22.
Which of the following HCP is a dental specialists for alignment of the teeth?
Correct Answer
D. Orthodontists
Explanation
Orthodontists are dental specialists who focus on the alignment of teeth. They specialize in diagnosing, preventing, and treating dental and facial irregularities, such as crooked teeth, crowded teeth, and misaligned jaws. They use various techniques, including braces, aligners, and other orthodontic appliances, to correct these issues. Orthodontists work closely with patients to create personalized treatment plans and help them achieve a straighter and more aligned smile.
23.
HCP who identifies and tracks diseases as they occur in a group of people?
Correct Answer
D. Epidemiologists
Explanation
Epidemiologists are healthcare professionals who specialize in identifying and tracking diseases as they occur in a group of people. They study patterns and causes of diseases in order to develop strategies for prevention and control. They analyze data, conduct research, and work closely with other healthcare professionals to monitor and respond to disease outbreaks. Psychiatrists, sociologists, and psychologists focus on different aspects of healthcare and do not typically specialize in disease tracking and identification.
24.
A HCP who is able to operate machines to record electrical impulses of the heart?
Correct Answer
C. ElectrocardiograpHic technician
Explanation
An electrocardiographic technician is a healthcare professional who specializes in operating machines to record electrical impulses of the heart. They are trained to use electrocardiogram (ECG) machines to monitor and interpret the electrical activity of the heart. This involves placing electrodes on the patient's chest, arms, and legs, and then operating the machine to record the heart's electrical signals. The technician is responsible for ensuring the accuracy of the recordings and may also assist in the analysis and interpretation of the results.
25.
A HCP who is able to operate a machine to record the electrical impulses of the brain?
Correct Answer
C. ElectroencepHalograpHic technologist
Explanation
An electroencephalographic technologist is a healthcare professional who is trained to operate a machine to record the electrical impulses of the brain. This involves placing electrodes on the patient's scalp and monitoring the electrical activity of the brain. They are responsible for ensuring the accuracy and quality of the recordings, as well as assisting physicians in interpreting the results. This role requires specialized knowledge and skills in neurophysiology and neuroanatomy, making it the most suitable answer among the given options.
26.
Which of the following HCP studies tissues, fluids, and cells under the supervision of a pathologists?
Correct Answer
A. Medical laboratory technician
Explanation
A medical laboratory technician is responsible for studying tissues, fluids, and cells under the supervision of a pathologist. They perform various laboratory tests, analyze the results, and help diagnose diseases or conditions. This role requires knowledge of laboratory procedures, equipment, and techniques to accurately analyze and interpret the samples. They play a crucial role in supporting the work of pathologists and other healthcare professionals in diagnosing and treating patients.
27.
Which of the following HCP uses many variations of bodywork, massage, and therapeutic touch to muscles?
Correct Answer
D. Massage therapists
Explanation
Massage therapists use many variations of bodywork, massage, and therapeutic touch to muscles. They are trained professionals who specialize in manipulating the soft tissues of the body to promote relaxation, relieve pain, and improve overall well-being. Through techniques such as Swedish massage, deep tissue massage, and sports massage, massage therapists target specific areas of the body to address muscle tension, knots, and other muscular issues. They may also incorporate other modalities such as aromatherapy or hot stone therapy to enhance the therapeutic effects of their treatments.
28.
Which of the following HCP organizes and code patient records and gathers statistical data?
Correct Answer
C. Health Information technician
Explanation
A Health Information technician organizes and codes patient records and gathers statistical data. They are responsible for managing and maintaining medical records, ensuring their accuracy and confidentiality. They play a crucial role in maintaining the quality, integrity, and security of patient information. By organizing and coding patient records, they enable healthcare providers to access and retrieve relevant information efficiently. Additionally, they gather statistical data to analyze trends, monitor patient outcomes, and contribute to healthcare research and planning.
29.
Which of the following HCP orders, maintains, and supplies equipment at a hospital?
Correct Answer
B. Central/Sterile Supply worker
Explanation
A Central/Sterile Supply worker is responsible for maintaining and supplying equipment at a hospital. They ensure that all necessary medical equipment is properly sterilized, organized, and available for use by healthcare professionals. This role is crucial in ensuring the smooth functioning of a hospital by providing the necessary tools and equipment for patient care. Biomedical Equipment technicians, Opthalmologists, and Recreational therapists have different roles and responsibilities that are not directly related to maintaining and supplying equipment in a hospital setting.
30.
Which of the following HCP studies human behavior, helps individuals deal with problems of living?
Correct Answer
C. Sociologists
Explanation
Sociologists study human behavior and help individuals deal with problems of living. They analyze how society influences behavior and provide insights into social issues such as poverty, inequality, and discrimination. Sociologists use research methods to understand the social factors that shape individuals' thoughts, actions, and interactions. They also develop strategies and interventions to address social problems and improve the overall well-being of individuals and communities.
31.
An RN educated to provide total care for normal pregnancies?
Correct Answer
C. Nurse Midwife
Explanation
A nurse midwife is an RN who has received specialized education to provide comprehensive care for normal pregnancies. They are trained to provide prenatal care, assist with labor and delivery, and provide postpartum care for both the mother and the newborn. Nurse midwives focus on promoting a healthy pregnancy and natural childbirth, but they are also equipped to handle any complications that may arise during the process. They work closely with obstetricians and other healthcare professionals to ensure the well-being of the mother and baby throughout the pregnancy journey.
32.
A HCP who manages food service systems and plans menus?
Correct Answer
A. Dietician
Explanation
A dietitian is a healthcare professional who manages food service systems and plans menus. They have expertise in nutrition and provide advice and guidance on healthy eating habits, meal planning, and dietary restrictions. Dieticians work closely with individuals, hospitals, schools, and other institutions to develop personalized meal plans that meet specific nutritional needs and promote overall health and well-being. They play a crucial role in helping individuals make informed choices about their diet and achieve their health goals.
33.
A HCP who dispenses medications and provides information on drugs?
Correct Answer
B. pHarmacists
Explanation
Pharmacists are healthcare professionals who dispense medications and provide information on drugs. They are trained to understand the composition and effects of various medications, as well as potential interactions and side effects. Pharmacists play a crucial role in ensuring the safe and effective use of medications, by counseling patients on proper dosage, storage, and administration. They also collaborate with other healthcare providers to optimize medication therapy and prevent medication errors.
34.
A HCP who uses recreational and leisure activities as a form of treatment?
Correct Answer
C. Recreational Therapists
Explanation
Recreational therapists are healthcare professionals who utilize recreational and leisure activities as a means of therapy. They design and implement treatment plans that incorporate activities such as sports, arts and crafts, music, and games to improve and maintain the physical, mental, and emotional well-being of their patients. Through these activities, recreational therapists aim to enhance their patients' physical fitness, cognitive abilities, social skills, and overall quality of life. They work with individuals of all ages and with various health conditions, including those with physical disabilities, mental health disorders, and chronic illnesses.
35.
A HCP who prevents and treats athletic injuries?
Correct Answer
C. Athletic trainer
Explanation
An athletic trainer is a healthcare professional who specializes in preventing and treating athletic injuries. They work closely with athletes to assess and manage injuries, develop rehabilitation plans, and provide guidance on injury prevention techniques. They are trained in anatomy, physiology, and biomechanics, allowing them to understand the specific demands placed on athletes' bodies during sports. Athletic trainers also play a crucial role in emergency care, providing immediate treatment for acute injuries on the field. Overall, their expertise and skills make them well-equipped to address the unique needs of athletes and ensure their optimal performance and well-being.
36.
A HCP who prevents, diagnoses, and treats diseases and injuries in animals?
Correct Answer
A. Veterinarian
Explanation
A veterinarian is a healthcare professional who specializes in preventing, diagnosing, and treating diseases and injuries in animals. They are trained and qualified to provide medical care to a wide range of animals, including pets, livestock, and wildlife. Veterinarians play a crucial role in ensuring the health and well-being of animals, and they often work in clinics, hospitals, or research facilities. They may perform surgeries, administer medications, provide vaccinations, and offer advice on animal care and nutrition.
37.
A HCP who examines the eyes for vision problems, not an MD?
Correct Answer
B. Optometrist
Explanation
An optometrist is a healthcare professional who specializes in examining the eyes for vision problems. They are not medical doctors (MDs) but are trained to diagnose and treat common eye conditions, prescribe corrective lenses, and refer patients to ophthalmologists for more complex eye issues. Ophthalmologists, on the other hand, are medical doctors who specialize in eye care and can perform surgery and treat a wider range of eye diseases and conditions. Opticians, on the other hand, are not healthcare professionals but are trained to fit and dispense eyeglasses and contact lenses based on prescriptions provided by optometrists or ophthalmologists. Orthodontists, on the other hand, specialize in the alignment of teeth and jaws and are not directly related to eye care.
38.
A HCP who provides information to individuals and families about inherited conditions or diseases?
Correct Answer
A. Genetic Counselor
Explanation
A genetic counselor is a healthcare professional who specializes in providing information and support to individuals and families about inherited conditions or diseases. They have expertise in genetics and can help individuals understand the risks, implications, and options available to them based on their genetic makeup. Genetic counselors play a crucial role in helping individuals make informed decisions about their health and the health of their families. They provide counseling, education, and guidance to individuals and families who may be at risk for genetic disorders or who are seeking information about their genetic health.
39.
Being able to identify with and understand another person's feelings, situation, and motives demonstrate:
Correct Answer
A. Empathy
Explanation
Empathy is the ability to understand and share the feelings of another person. It involves being able to put oneself in someone else's shoes and see the world from their perspective. By being empathetic, one can connect with others on a deeper level, show compassion, and provide support. It is an important skill in building relationships, resolving conflicts, and promoting understanding and cooperation among individuals.
40.
The ability to be tolerant, to be understanding, and to control your temper indicates:
Correct Answer
C. Patience
Explanation
The ability to be tolerant, understanding, and control your temper indicates patience. Patience is the ability to remain calm and composed in difficult situations, to tolerate the shortcomings of others, and to understand different perspectives. It involves controlling one's emotions and not reacting impulsively. Being patient allows for better communication, problem-solving, and maintaining healthy relationships. Empathy, enthusiasm, and honesty are important traits, but they do not directly indicate the ability to be tolerant, understanding, and control one's temper like patience does.
41.
Enjoying your work and displaying a positive attitude displays:
Correct Answer
D. Enthusiasm
Explanation
Displaying a positive attitude and enjoying one's work demonstrates enthusiasm. This means that the person is passionate, energetic, and excited about what they are doing. Enthusiasm can be contagious and inspire others around them. It also shows that the person is fully engaged and committed to their work, which can lead to increased productivity and success.
42.
Having the ability to say or do the kindest or most fitting thing in a difficult situation shows:
Correct Answer
A. Tact
Explanation
Tact refers to the ability to say or do the kindest or most fitting thing in a difficult situation. It involves being able to handle sensitive or delicate matters with diplomacy and sensitivity, considering the feelings and perspectives of others. Having tact demonstrates emotional intelligence and interpersonal skills, as it allows individuals to navigate challenging situations while maintaining positive relationships and minimizing conflict. This ability is highly valued in personal and professional settings, as it helps to create a respectful and harmonious environment.
43.
Being willing to be held accountable for your actions is:
Correct Answer
C. Responsibility
Explanation
Responsibility refers to the willingness to take ownership of one's actions and accept the consequences that may arise from them. It involves being accountable for one's decisions and behaviors, both in personal and professional life. It also implies being reliable and dependable, fulfilling commitments and obligations. Therefore, being willing to be held accountable for your actions aligns with the concept of responsibility.
44.
The ability to begin or follow through with a task and to determine things that need to be done indicates:
Correct Answer
D. Willingness to learn
Explanation
The ability to begin or follow through with a task and to determine things that need to be done indicates willingness to learn. This is because someone who is willing to learn is open to new ideas and experiences, and is motivated to acquire new knowledge and skills. They are likely to take initiative, be proactive, and show a strong sense of curiosity and interest in learning and growing. This willingness to learn enables them to effectively start and complete tasks, as well as identify what needs to be done in order to achieve their goals.
45.
Using good judgment in what you say or do and making sure that the patient's rights are not violated:
Correct Answer
D. Discretion
Explanation
Discretion refers to the ability to use good judgment and make wise decisions in what one says or does. In the context of healthcare, it means being careful and cautious in maintaining patient confidentiality and privacy, ensuring that their rights are not violated. Healthcare professionals need to exercise discretion when handling sensitive information, respecting the patient's autonomy and maintaining their trust. This involves being mindful of what information is shared, with whom, and under what circumstances, to protect the patient's privacy and maintain their dignity.
46.
Being qualified and capable of performing a task while striving for accuracy in all you do shows:
Correct Answer
A. Competence
Explanation
Being qualified and capable of performing a task while striving for accuracy in all you do shows competence. Competence refers to having the necessary skills, knowledge, and abilities to successfully complete a task or job. It also implies the ability to consistently produce high-quality work and meet expectations. By demonstrating competence, individuals prove that they are reliable and capable of handling responsibilities effectively.
47.
Being prompt when reporting to work, avoiding absences, and completing assigned task on time demonstrates:
Correct Answer
B. Dependability
Explanation
Being prompt when reporting to work, avoiding absences, and completing assigned tasks on time demonstrates dependability. Dependability refers to the quality of being reliable and trustworthy, and these actions show that the individual can be counted on to fulfill their responsibilities consistently and meet expectations. By being punctual, reliable, and responsible, the person displays their dependability and shows that they can be relied upon to perform their duties effectively.
48.
Leaning to work well with others demonstrates:
Correct Answer
A. Team player
Explanation
The ability to work well with others demonstrates being a team player. This means being able to collaborate, communicate effectively, and contribute positively to achieve common goals. A team player understands the importance of cooperation, supports their teammates, and values the overall success of the team over individual achievements. They are willing to share responsibilities, listen to others' perspectives, and adapt their own approach to work harmoniously with the group. Being a team player fosters a positive work environment, enhances productivity, and builds strong professional relationships.
49.
The exchange of information, thoughts, ideas, and feelings is:
Correct Answer
C. Communication
Explanation
Communication refers to the process of exchanging information, thoughts, ideas, and feelings between individuals. It involves both verbal and nonverbal methods of expression, such as speaking, writing, body language, and gestures. Through communication, individuals can convey their thoughts and emotions, share information, and understand each other's perspectives. It is a fundamental aspect of human interaction and plays a crucial role in building relationships, resolving conflicts, and fostering understanding among individuals.
50.
Which of the following factors does not interfere with the communication process?
Correct Answer
C. Properly working hearing aide
Explanation
A properly working hearing aid does not interfere with the communication process. Interruptions or distractions can disrupt the flow of communication, medical terminology can cause confusion or misunderstanding, and a soft-muted voice may make it difficult to hear and understand the message. However, a properly working hearing aid enhances the ability to hear and participate in communication without causing interference.