PSYCH Lecture 2 & 3

PSYCH Lecture 2 & 3 - Psychological Research What...

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Psychological Research 1/13/11
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What do you believe? Theory: A systematic way of organizing and understanding observations Hypothesis: A proposed relationship between two variables
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Variable: anything which can be measured or described along a particular dimension Continuous Variable: can be measured across a continuum (range of numbers) Categorical Variable: fixed meaning or attribute
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Operationalize Definitions: label & describe variables of interest Research on sexual activity and adolescence: how do you define “sexually active” – WHAT is sexually active? (esp. to the students tested) Research on marijuana use and academic achievement: how does one define/differentiate “use”. (study: more pot, less academically well keep in mind, HEAVY or LIGHT user?) Research on aggression and preschoolers: What is aggression? (for purposes of study, WHAT is it?)
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Research Methods in Five Easy Steps Develop a theory based on observations Develop a hypothesis from the theory Design a research study Gather the data Analyze the data and report findings
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Measurement Issues in Research Validity: does it measure what it is supposed to measure? Correct? Reliability: do you get consistent results over time? **NEED A MEASURE OF BOTH
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Data Collection Techniques Direct Observation Questionnaires Interviews What do kids thinks, what do they know. Theory of Mind. Interview to figure out that kids don’t yet have ability to judge a state of mind. Psychological Tests Physiological Recordings Stress level: spit & check cortisone level. Ex. 13 to 15 month if exposed to words they understand, both sides of brain react to that. Examination of Historical Records John/Joan report looked at reports of elementary, high school…
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Various Types of Psychological Research
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Experimental Method Systematic Observation Explores changes in variables of Interest Independent Variable is manipulated by the experimenter Dependent variable is measured – assess any change in response to the manipulation
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PSYCH Lecture 2 & 3 - Psychological Research What...

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