chapter 2a - Many times participants drop out and the study...

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THE SCIENCE OF LIFE-SPAN DEVELOPMENT TIME SPAN OF RESEARCH Cross-Sectional Approach Cross-sectional approach is a research strategy in which individuals of different ages are compared at one time. The groups can be compared with respect to a variety of dependent variables: IQ, memory, peer relations, etc. The main advantage is that the researcher doesn’t have to wait for individuals to become older. Longitudinal Approach Longitudinal approach is a research strategy in which the same individuals are studied over a period of time, usually several years. These studies provide a wealth of information about important issues as stability and change in development and importance of early experience for later development. Their drawbacks are that they are expensive and take lots of time.
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Unformatted text preview: Many times participants drop out and the study will become biased. Sequential Approach Sequential approach is combined cross-sectional and longitudinal design. This approach starts with cross-sectional and includes subjects of different ages. The same are tested again, which brings in the longitudinal study. This approach is complex, expensive, and time consuming, but does provide information that is impossible to obtain from just one of the studies alone. Cohort Effects Cohort effects are effects due to a persons time of birth, era, or generation but not actual age. They are important because they can powerfully affect the dependent measure in a study concerned with age....
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This note was uploaded on 04/30/2008 for the course PSY 235 taught by Professor Pak during the Spring '08 term at Rhode Island.

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