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Direct linkCahit, Kaya – Educational Research and Reviews, 2015
In experimental research, internal validity refers to what extent researchers can conclude that changes in dependent variable (i.e. outcome) are caused by manipulations in independent variable. The causal inference permits researchers to meaningfully interpret research results. This article discusses (a) internal validity threats in social and…
Descriptors: Research Design, Validity, Predictor Variables, Educational Research
Download full textReio, Thomas G., Jr. – New Horizons in Adult Education & Human Resource Development, 2007
Surveys continue to be one of the primary research methods in social science research, as they have been useful for exploring subjects ranging from attitudes and intentions to motivations and behaviors, to name but a few. Notwithstanding, response rates in survey research continue to decline despite the development of more systematic procedures to…
Descriptors: Social Sciences, Social Science Research, Research Methodology, Response Rates (Questionnaires)
Welge, Patricia – 1990
L. A. Marascuilo and R. C. Serlin (1988) note that stepwise regression is a method used frequently in social science research. C. Huberty (1989) characterizes such applications as being "common". In support of this latter statement, a review of dissertations by B. Thompson (1988) demonstrated that dissertation students frequently use…
Descriptors: Computer Software, Doctoral Dissertations, Predictor Variables, Regression (Statistics)
Bulcock, J. W. – 1981
The problem of model estimation when the data are collinear was examined. Though the ridge regression (RR) outperforms ordinary least squares (OLS) regression in the presence of acute multicollinearity, it is not a problem free technique for reducing the variance of the estimates. It is a stochastic procedure when it should be nonstochastic and it…
Descriptors: Analysis of Covariance, Least Squares Statistics, Mathematical Models, Predictor Variables
Peer reviewedYeaton, William H.; Sechrest, Lee – Evaluation Review, 1986
The central thesis of this article is that the process of eliminating validity threats depends fundamentally on no-difference findings, a fact that has not been made explicit by researchers. The implications of this neglect are explored using examples from a number of different substantive areas such as psychology, health, and medicine.…
Descriptors: Attrition (Research Studies), Construct Validity, Generalizability Theory, Hypothesis Testing
Peer reviewedYunker, James A. – Crime and Delinquency, 1982
Reviews several potential problems that often invalidate statistical tests of social theories. Discusses how there may be very serious identification problems in the estimation of the relationship between executions and homicides, and that serious questions may be raised regarding the validity of any particular estimation of this relationship.…
Descriptors: Capital Punishment, Identification, Information Needs, Models
