PSYC 201 Chapter Notes - Chapter 10, 11: Latin Square, Internal Validity, Complement Factor B
14 Mar 2017
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Psyc 201 - chapter 10 & 11: true experiments true experiment: scientist has complete control over all aspects. Manipulate: has enough control over the situation to decide which participants receive which treatments, at which time potential threats to validity are minimized. More general - result from warm-up, learning, fatigue, etc. (b) sequence effect: changes in the subject"s performance resulting from interactions among the conditions themselves. Useful if conditions are presented many times. Through chance, odd sequences may result (ii) block randomization: the order of conditions is randomized, but with each condition being presented once before any condition is repeated. Intra-subject method useful when conditions are presented several times to each subject overcomes problem of randomization (iii) reverse counterbalancing: conditions are presented in order the rst time, & then in reverse the second time. Useful if conditions can be presented only a few times per subject. Does an incomplete job of controlling for order/ sequence effects.
