PSYC 2360 Chapter Notes - Chapter 7: Birth Weight, Operational Definition, Dependent And Independent Variables

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plumleopard659

23 Nov 2011

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Chapter 7 selection of variables, operational definitions, and. An independent variable is the variable in a study we manipulate. A dependent variable is the variable being measured. Levels of the independent variable - the number of conditions for a specific independent variable e. g. , low birth weight & normal birth weight. Multiple dependent variables - having more than one dependent variable i. e. , to increase the amount of information collected. Floor effect - when scores fall primarily at the lower range of a response option e. g. , most students getting below 20% on a certain difficult test. Ceiling effect - when scores fall primarily at the upper range of a response option e. g. , most students getting above 80% on a certain easy test. Operational definition - defines how a concept or idea will be measured (not defining a concept) i. e. , to make a broad concept more specific.

Related Questions

16. A hypothesis is an) a unprovable assumption about the unobservable processes that underlie psychological functioning. b. set of principles that organizes observations and explains newly discovered facts, c. testable prediction that gives direction to research. d. observable relationship between specific independent and dependent variables.

1) A doctor and his assistant are studying patients with visuospatial neglect. They 36 patients who just had strokes that damaged their right hemispheres. 16 of these patients have been diagnosed with visuospatial neglect based on their attention test score of 53 or less (normal test score is <236 ). These visuospatial neglect patients recovery is then tracked over a period of 2 weeks, that is their attention test score are observed after varying periods of time. All the patients recover expect 6 who seem to have made no recovery. a) What is a plausible hypothesis for this study? b) What is the independent variable? c) What is the dependent variable? d) Is this study an experiment? Explain e) What can u infer about the recovery from visuospatial neglect

cerisecrab872

17. A psychologist is studying the effects of orange juice on the prevention of colds. She has one group drink a glass of orange juice every day for the month of December. A second group drinks a glass of orange juice once a week during December, while a third group is not given any orange juice at all during this time period. Previous medical histories were obtained for all the participants. In January, she records how many colds each participant gets over the entire month. In this study, the independent variable is A) the severity of the colds in January B) the number of colds each participant got in January C) the prior medical histories D) drinking orange juice every day E) the amount of orange juice consumed

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PSYC 2360 Chapter Notes - Chapter 7: Birth Weight, Operational Definition, Dependent And Independent Variables

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