Psych Assessment Flashcards
(201 cards)
assumption 1
psychological traits and state exists
assumption 2
psychological traits and states can be quantified and measure
is any distinguishable, relatively enduring way in which one individual varies from one another
trait
distinguishes one person from another but relatively less enduring
state
assumption 3
test behavior predicts non-test behavior
assumption 4
test and other measurements have strengths and weaknesses
assumption 5
sources of error are part of the assessment process
long standing assumption that factors other than what a test attempts to measure will influence performance on the test
error
refers to the component of test score attributable to sources other than the trait or ability measured
error variance
assumption 6
testing and assessment can be done in a fair and unbiased way
assumption 7
testing and assessment can benefit society
is the stability or consistency of the measurement
reliability
includes the notion that each individual measurement has an element of error such as observer’s error, environmental changes, participant’s changes, etc
reliability
- index of reliability
- a proportion that indicates the ratio between the true score variance on a test and the total
variance
reliability coefficient
defined as one on which test takers will fall in the same positions relative to each other
reliable test
Stable charcteristics of the individual
true characteristics
Chance features of the individual or the situation
random measurement of error
tools used to estimate or infer the extent to which an observed score deviates from a true score
standard error of estimates
used to evaluate the error associated with administering a test at two different times.
test-retest
- When interval between testing is greater than six months
- the estimate of test-retest reliability. obtained using pearson-r
coefficient of stability
compares two equivalent forms of a test that measure the same attribute
parallel/alternate forms
• a test is given some and divided into halves that are scored separately.
• The results of one half of the test are then compared with the results of the other.
• Use the odd-even system, whereby one subscore is obtained for the odd-number items in the test and another for the even -numbered items.
split-half method
- Refers to the degree of correlation among all the items on a scale.
- Useful in assessing the homogeneity of the test
inter-item consistency
Methods used to obtain estimates of internal consistency:
- KR 20
- Cronbach alpha