Digital Commons Network^™

Experimenter Bias Effect At Varying Levels Of Motivation, Leslie Marie Slade Gray

All Master's Theses

This study examined the effects of experimenter motivation upon the experimenter bias effect on a person perception task. It was hypothesized that the experimenter bias effect would decrease as reward and threat of punishment increased.

Thirty-five experimenters were randomly assigned to five treatment groups including a control group, two reward groups, and two punishment conditions. Each experimenter administered the photo task to two subjects. The results failed to support the experimental hypotheses.

A Comparison Of Verbal And Geometric Stimuli In Concept Learning, Robert William Greenway

All Master's Theses

Subjects classified stimulus patterns into positive or negative instances of the concept according to either an attribute identification (AI) problem or a rule learning (RL) problem. Four types of stimulus materials were used: verbal stimuli (V), geometric stimuli (G), or two combinations of these modes, verbal geometric (VG) or verbal colored (VC). The only main effects that were significant were the Type of rule and Type of problem. Some interactions were obtained between these factors and the stimulus mode employed.

The Effects Of Truth Table Pretraining And Intradimensional Variability On Rule Learning And Attribute Identification Tasks, Eric S. Gebelein

All Master's Theses

Ss were required to sort geometrical patterns into positive or negative instances. According to (a) an attribute identification problem (wherein one of three conceptual rules was given: Disjunctive, Conditional, or Biconditional) or (b) Rule learning problem (wherein the two relevant attributes were given: either yellow, triangle or blue, circle). Intradimensional variability for each condition was either five, seven, or nine levels. The Rule effect was the only significant source of variance even though performance did worsen as intradimensional variability was increased.