PSY301 Midterm (Lecture 6) Questions with Detailed Verified Answers for Accuracy

ACCURACY IS GUARANTEED


PSY301 Midterm (Lecture 6) Questions with
Detailed Verified Answers for Accuracy
Reliability

✓✓ The extent to which measures are consistent and
repeatable.


Assessed through correlations
- High correlation = high reliability of measure
- Low correlation = low reliability of measure


4 Types of Reliabiltiy

✓✓ Test-retest
Alternate forms
Internal consistency
Inter-rater


Test-Retest Reliability

✓✓ Test administered to same person on two separate
occasions and correlation between the two tests is calculated


Alternate Forms Reliability

✓✓ Correlation between 2 different (but similar) versions of a
measure


Internal Consistency Reliability

, ACCURACY IS GUARANTEED

✓✓ Consistency of items within a test
Forms:
- Average inter-item correlation
- Average item-total correlation
- Split - half
- Cronbach's alpha (a)


Inter-Rater Reliability

✓✓ Degree of agreement between two or more observers of the
same event is calculated


Validity

✓✓ The extent to which measures are accurate and findings are
generalizable
The extent to which we can order higher-order constructs for
our variables


Are assessments of validity subjective or objective?

✓✓ Subjective.


Internal Validity

✓✓ Did the manipulation of the IV cause the
change in the DV (high internal validity) or
did something else cause the change (low
internal validity)?