RM Chpt 5 Flashcards
(14 cards)
Consistency or stability of a measure of behavior
Reliability:
Real score on the variable
True score:
Unreliable measure of intelligence
Measurement error:
Ranges from 0.00 to +1.00 and 0.00 to -1.00
Pearson product-moment correlation coefficient:
Assessed by measuring the same individuals at two points in time
Vulnerable to artificiality
Vulnerable to maturation
Test-retest reliability:
Assessed using responses at only one point in time
Internal consistency reliability:
Correlation of the total score on one half of the test with the total score on the other half
Split-half reliability:
Average of all possible split-half reliability coefficients
Cronbach’s alpha:
Correlation of each item score with the total score based on all items
Item-total:
Correlation between the observations of raters
Interrater reliability
Categories with no numeric scales
Nominal
Rank ordering
Numeric values limited
Ordinal
Numeric properties are literal
Assume equal interval between values
Interval
Zero indicates absence of variable measured
Ratio