Psyc 255 Exam 2

amwages's version from 2017-11-02 01:15

Section 1

Question Answer
reliabilityrefers to the consistency or stability of a measure of behavior
any measure that you make can be thought of as compromising two components1) true score and 2) measurement error
test-retest reliabilityassessed by measuring the same individuals at two points in time
alternate forms reliabilityrequires administering two different forms of the same test to the same individuals at two points in time
Internal consistency reliabilityassessment of reliability using responses at only one point in time
split-half reliabilitythe correlation of the total score on one half of the test with the total score on the other half
Cronbach's alphacommonly used indicator of reliability based on internal consistency
item-total correlationsprovide info about each individual item
interrater reliabilitythe extent to which raters agree in their observations
construct validityconcerns whether our methods of studying variables are accurate

Section 2

Question Answer
face validitythe content of the measure appears to reflect the construct being measured
content validitythe content of the measure is linked to the universe of content that define the construct
predictive validityscores on the measure predict behavior on a criterion measured at a future time
concurrent validityscores on the measure are related to a criterion measured at the same time (concurrently)
convergent validityscores on the measure are related to other measures of the same contruct
discriminant validityscores on the measure are not related to other measures that are theoretically different
nominal scalescategories with no numeric scales (males/females, extroverts/introverts)
ordinalrank ordering (rating restaurants, or popular TV programs)
intervalnumeric properties without a zero (intelligence, temperature, aptitude test)
rationumeric properties with a zero (reaction time, weight, age)

Section 3

Question Answer
reactivitythe possibility that the presence of the observer will affect people's behaviors
case studyobservational method that provides a description of an individual
psychobiographytype of case study in which a researcher applies psychological theory to explain the life of an individual
archival researchinvolves using previously compiled information to answer research questions
content analysissystematic analysis of existing documents
response settendency to respond to all questions from a particular perspective rather than to provide answers that are directly related to the questions
graphic rating scalerequires a mark along a continuous 100-millimeter line
focus groupinterview with a group of about 6 to 10 individuals brought together for a period of usually 2-3 hours
panel studysame people are surveyed at two or more points in time
sampling framethe actual population of individuals
confounding variablevariable that varies along with the independent variable
drop out factorattrition

Section 4