This paper provides a rationale for using and sustaining rival hypotheses Web-based tools to promote students' understanding of the concepts of internal and external validity. Five major concerns are identified. The first is that, in their present form, the Web sites subsume the discussion of threats to validity under experimental designs, giving…

This paper provides examples of how one can use the research issue and the relationships between qualitative and quantitative research as a frame for instructing students and judging the quality of research. The emphasis is on validity estimates, also called legitimization techniques, with attention to the idea of a qualitative-quantitative…

A simple shortcut procedure for analysis of variance is presented using the means, standard deviations, and number of cases in each sample directly. (Author/NE)

Study was directed at determining the extent to which Type I error rate is affected by violations in the basic assumptions of the test based on the q statistic. (Authors/CB)

The ability of M. Levine's subset-sampling assumptions to account for the decrease in response latency following the trial of the last error was investigated by employing a distributed stimulus set composed of four binary dimensions and a procedure which required Ss to make an overt response in order to sample each dimension. (Author)

Thirty kindergarten children in three sessions performed a lever-pulling task under three partial reinforcement conditions. The results of the experiment demonstrated that both recency and summation of nonreward influenced performance as measured by latency. Based in part on a Master's Thesis submitted bu the first author in partial fullfillment…