research methods

research methods - 1/18/10 RESEARCH METHODS IN MOTOR...

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1/18/10 1 RESEARCH METHODS IN MOTOR DEVELOPMENT The Scientific Method Assumption: ALL BELIEFS NO MATTER HOW PROBABLE MAY BE WRONG. Hypothesis Testing 1. Choose a question 2. Formulate a hypothesis 3. Test hypothesis 4. Using the data, draw a conclusion regarding the hypothesis
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1/18/10 2 Appropriate measurements 1. Reliability Consistency of measurements Test / retest reliability Appropriate measurements 2. Validity Does test measure what it is intended to measure. Internal validity - Is change really due to manipulations? External validity - Can results be extended beyond test population? Quantifying measurements Correlation Do children who differ in one characteristic differ in another characteristic?
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1/18/10 3 Correlation does not equal causation Third variable problem Example: Positive correlation in US between number of murders and number of churches in an area. Baby Einstein Controversy Study reported in the August issue of Journal of Pediatrics. Claim: Watching Baby Videos reduces vocabulary of infants
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1/18/10 4 Baby Einstein Controversy Methods 1008 parents asked questions regarding how much television children watched Parents also filled out communicative development inventory (what words to kids know) Baby Einstein Controversy Results:
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research methods - 1/18/10 RESEARCH METHODS IN MOTOR...

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