Chapter 3 Flashcards
Reliability
The degree to which a procedure, test, or classification system yields the same results repeatedly under the same circumstances.
Types of Reliability
Test-retest Reliability, Internal Consistency Reliability, Interrater Reliability
Test-retest Reliability
Determines whether a measure yields the same results when given at two different points in time. For example, if you take a personality test in the morning and then retake the test later in the day, the test is reliable if the results show stability (i.e., are consistent) from one point in time to another. If the test results vary, we would say the test has poor reliability.
Internal Consistency Reliability
Requires that various parts of a test yield similar or consistent results. For example, on a test assessing anxiety, each test item should reliably measure characteristics related to anxiety.
Interrater Reliability
Refers to how consistent (or inconsistent) test results are when scored by different test administrators. (Imagine that two clinicians trained to diagnose individuals according to a certain classification system are given the same list of symptoms to review and are asked to formulate a psychodiagnosis. If one clinician diagnoses an anxiety disorder and one diagnosis depression, there would be poor interrater)
Validity
The extent to which a test or procedure actually performs the function it was designed to perform. If a measure intended to assess depression actually measures motivation, the measure is an invalid measure of depression. The most common forms of validity considered in assessment are predictive, construct, and content validity
Types of Validity
Predictive Validity, Construct Validity, Content Validity
Predictive Validity
How well a test or measure predicts or forecasts a person’s behavior, response, or performance. Colleges and universities often use applicants’ SAT or ACT scores to predict future college grades. If the tests have good predictive validity, they should be able to differ- entiate students who will perform well in college from those who will perform poorly.
Construct Validity
How well a test or measure relates to the characteristics or disorder in question. For example, a test to measure social anxiety should be constructed to match other measures of social anxiety, including questions about physical symptoms seen in people who are socially anxious.
Content Validity
How well a test measures what it is intended to measure. For example, we know that depression involves cognitive, emotional, behavioral, and physiological symptoms. If a self-report measure of depression contains items that assess only cognitive features, such as items indicating pessimism, the measure has poor content validity because it fails to assess the other areas we know are associated with depression.
What is standardization?
(Or standard administration); Requires professionals administering a test to follow common rules or procedures. If an examiner creates a tense or hostile environment for some individuals who are taking a test, for example, the test scores may vary simply due to differences in the testing situation
10 areas of a mental status exam
Appearance, Mood, Affect, Speech, Thought Process, Thought Content, Memory, Abstract Thought, General Knowledge, Sensorium
Appearance
Poor self-care in grooming; disheveled appearance; stooped body posture; avoidance of eye contact.
Mood
Appears severely depressed. Margaret verified that she has felt “depressed,” “exhausted,” “hopeless,” and “worthless” for months.
Affect
Margaret shows minimal emotional responsiveness. Her overall demeanor is suggestive of depression.
Speech
Margaret speaks and responds slowly, with short replies. She frequently stated, “I don’t know” and “I don’t care.”
Thought Process
Margaret’s lack of responsiveness made it difficult to assess her thought processes.
Thought Content
Margaret denies experiencing hallucinations or delusions (false beliefs). She reports thinking about suicide almost daily but denies having a suicide plan or thoughts of hurting someone else.
Memory
Margaret seems to have good recall of family background, past events, jobs, and educational background. However, she had difficulty with short-term memory, she was able to recall only one out of three words after a 5-minute delay.
Abstract Thought
Margaret was slow to respond but was able to explain the proverb “a rolling stone gathers no moss” and “people in glass houses shouldn’t throw stones.”