PSY 1630 Lecture 3

PSY 1630 Lecture 3 - Research Methods Progress in...

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Research Methods Progress in Developmental Psychology involves the application of the Scientific Method Assumptions -All beliefs about development, even probable-seeming ones, _can be wrong___ -Until tested, such beliefs are viewed as _hypotheses or educated guesses -Evidence from research may support a hypothesis but doesn’t __prove it is true__ 4 steps involved in the Scientific Method: Choose a__question to be answered__ What abilities of preschoolers predict future reading ability? Formulate a___hypothesis regarding it___ Preschoolers who can (a) identify sounds in words will (b) become better readers than those who cannot. Develop a__method for testing a hypothesis____________________ Test (a) in preschoolers; several years later, test (b) reading ability. Use__data yielded by the method_to draw________________________ Data indicate children who are especially good at (a) have higher scores on (b), supporting the hypothesis. Importance of appropriate measures Hypothesis: “Infants prefer to look at bright colors”
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Measure: looking time The hypothesis is about preference , and looking time is a good measure of preference. Hypothesis: “Toddler boys will be more sex-typed in their play than toddler girls.” Measure: Place two types of toys in front of them and see which they choose to play with. Other Measurement Issues Measure must be: --Reliable (consistent) --Valid (measure what it says it is measuring; see pg 25) Reliability (2 kinds): Inter-rater reliability If different observers view the same behavior--will they rate it the same e.g., How violent will they rate a behavior? (on a scale of 1-10) Test-retest reliability Are children’s scores on an IQ test similar on two occasions? If not, we don't know which score reflects the true ability Test is not reliable 3 Contexts for Studying Development Interviews: Structured—ask same questions of each participant Clinical—In depth, unique, follow the child's lead
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This note was uploaded on 02/11/2009 for the course PSYCH 101 taught by Professor Khalid during the Spring '07 term at Vanderbilt.

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PSY 1630 Lecture 3 - Research Methods Progress in...

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