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UP10 Chapter 2
Psychological Research
| Question | Answer |
|---|---|
| Scientific Method | The approach through which psychologists systematically acquire knowledge and understanding about behavior and other phenomena of interest. |
| Theories | Broad explanations and predictions concerning phenomena of interest. |
| Hypothesis | A prediction, stemming from a theory, stated in a way that allows it to be tested. |
| Operational Definition | The translation of a hypothesis into specific, testable procedures that can be measured and observed. |
| Archival Research | Research in which existing data, such as census documents, college records, and newspaper clippings, are examined to test a hypothesis. |
| Naturalistic Observation | Research in which an investigator simply observes some naturally occurring behavior and does not make a change in the situation. |
| Survey Research | Research in which people chosen to represent a larger population are asked a series of questions about their behavior, thoughts, or attitudes. |
| Case Study | An in-depth, intensive investigation of an individual or small group of people. |
| Variables | Behaviors, events, or other characteristics that can change, or vary, in some way. |
| Correlational Research | Research in which the relationship between two sets of variables is examined to determine whether they are associated, or "correlated." |
| Experiment | The investigation of the relationship between two (or more) variables by deliberately producing a change in one variable in a situation and observing the effects of that change on other aspects of the situation. |
| Experimental Manipulation | The change that an experimenter deliberately produces in a situation. |
| Treatment | The manipulation implemented by the experimenter. |
| Experimental Group | Any group participating in an experiment that receives a treatment. |
| Control Group | A group participating in an experiment that receives no treatment. |
| Independent Variable | The variable that is manipulated by and experimenter. |
| Dependent Variable | The variable that is measured and is expected to change as a result of changes caused by the experimenter's manipulation of the independent variable. |
| Random Assignment to Condition | A procedure in which participants are assigned to different experimental groups or "conditions" on the basis of change and chance alone. |
| Significant Outcome | Meaningful results that make it possible for researchers to feel confident that they have confirmed their hypothesis. |
| Replicated Research | Research that is repeated, sometimes using other procedures, settings, and groups of participants, to increase confidence in prior findings. |
| Informed Consent | A document signed by participants affirming that they have been told the basic outlines of the study and are aware of what their participation will involve. |
| Experimental Bias | Factors that distort how the independent variable affects the dependent variable in an experiment. |
| Placebo | A false treatment, such as a pill, "drug," or other substance, without any significant chemical properties or active ingredients. |