PSYCH 9A Lecture Notes - Lecture 2: Effect Size, Internal Validity, Statistical Significance
24 Jan 2014
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Systematically collecting data: memories are often selective; confirmation bias, anecdotal evidence (evidence that involved 1-2 cases) not used to draw conclusions. If want to examine how diverse population is maximum variation sampling (deliberately seek out unusual cases) Case study- an intensive study of one person: h. m. most studied man in history, suffered memory deficits, phineas gage frontal lobe damage. Monitoring demand characteristics: demand characteristics- the cues in a study that might tell a research participant what behaviors are expected or desirable in that setting, to minimize a study"s demand characteristics, 1. Try to phrase questions as neutrally as possible: 2. Double-blind design- the technique of assigning participants to experimental conditions while keeping both the participants and the researchers unaware of who is assigned to which group. Working with data: analysis involves two parts, 1. Descriptive statistics- allow a researcher to characterize a data pattern; include measures of central tendency and of variability: 2.
