2nd lecture - Psychological Research What do you believe?...

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Psychological Research
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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: a variable which can be measured across a continuum Categorical Variable: a variable with a fixed meaning or attribute
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Operationalize Definitions: Research on sexual activity and adolescence: how do you define “sexually active” Research on marijuana use and academic achievement: how does one define/differentiate “use” Research on aggression and preschoolers: what is aggression?
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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 Reliability: do you get consistent results over time
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Data Collection Techniques Direct Observation Questionnaires Interviews Psychological Tests Physiological Recordings Examination of Historical Records
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Various Types of Psychological Research
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Experimental Method Systematic Observation Explores changes in variables on interest Independent Variable: manipulated by the experimenter Dependent variable: measured to assess any change in response to the manipulation
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Subjects: random sample which represents
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2nd lecture - Psychological Research What do you believe?...

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