Solved IGNOU Assignment >> MPC003 >> Q14

14. Reliability and validity of Rorschach

Rorschach test is a psychometric tool that uses a series of inkblots shown to a subject, and elicits verbal responses as to what the individual sees in the images.  It is administered by an examiner who asks questions and records answers.  Subject responses are used to determine a set of variables, which are used to define their personality along a set of various axes.

Reliability

Reliability depends on the ability to achieve a given measurement consistently (Weiner & Greene, 2008). It is reliable when evaluated using a defined rating scale and an appropriate set of examiners.  Inter-rater reliability and test-retest reliability are acceptable under these conditions. Exner reported reliabilities from .26 to .92 over a 1-year interval considering 41 variables; four of them were above .90, 25 between .81 and .89, and 10 below .75.

Validity

Validity depends on the ability of a test to measure the constructs that it is purported to measure (Wiener & Greene, 2008).  Groth-Marnat (2009, p. 391) pointed out that results of validity studies on the Rorschach are mixed, but are confounded by various factors including the “type of scoring system, experience of the scorer, and type of population.”

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Sources:
http://www.brainmaster.com/kb/entry/489/

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MPC001: Cognitive Psychology
MPC002: LifeSpan Psychology
MPC003: Personality: Theories and Assessment
MPC004: Advanced Social Psychology
MPC005: Research Methods in Psychology
MPC006: Statistics in Psychology

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