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RAT PREP 1

RAT PREP 1. Helpful Defintions. A hypothesis is a tentative statement that describes the relationship between two or more variables. A theory , or model, is a tentative explanation that tries to integrate and account for diverse findings on the same topic.

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RAT PREP 1

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  1. RAT PREP 1

  2. Helpful Defintions • A hypothesis is a tentative statement that describes the relationship between two or more variables. • A theory, or model, is a tentative explanation that tries to integrate and account for diverse findings on the same topic. • ---Theories are tools for explaining behavior and mental processes; they evolve and change as new evidence emerges, reflecting the self-correcting nature of the scientific enterprise.

  3. A sample is a selected segment of the larger group or population being studied. • A representative sample very closely parallels the larger group on relevant characteristics, such as age, sex, race, marital status, and educational level. • -----To help ensure that researchers select a representative sample, researchers commonly use random selection, which means that every member of the larger group has an equal chance of being selected for inclusion in the sample. • Researchers use random assignment to assign participants to different experimental groups.

  4. 11. Correlation ONLY indicates a relationship between 2 or more variables. Causation can only be determined when the experimental method is used.

  5. What is the basic goal of the experimental method? • A) describe and predict naturally occurring phenomena • B) discover new operational definitions • C) demonstrate that one variable causes changes in another variable • D) investigate a single subject in depth

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