Two hundred seventh grade Ss were administered a paired comparison scale for the purpose of predicting reinforcer effectiveness of fifteen stimuli. (Authors)

Results confirmed previous findings that response speeds would be faster following an 18- than a 8-second stimulus duration. (Author)

The effects of rate of stimulus presentation and reinforcement conditions on the two-choice discrimination learning performance of MA matched normal and familial retarded children were examined. (Authors)

Mothers of 232 pairs of twins were interviewed periodically about the similarities and differences in behavior displayed by their twins during infancy and early childhood. (Authors)

A combination of readiness and body-part training was the most effective in producing number conservation with external objects. (Authors)

The statistical data of this study would tend to support the idea that the effect of attitude on achievement is independent of the method of instruction. (Author)

Data implies that the presence of a VTR in a classroom speaking situation did not create any negative aspects of speaker response. (Authors)

In the fifth and sixth years of life, the ability of girls to identify primary colors by name is greater than that of boys. Children in the sixth year who attend school outperform those who have not been to school, and girls of this age who have not been to school name colors as well as boys who attend school. (Authors)

A study designed to compare the academic achievement of pupils in graded and non-graded schools using an Index of Non-gradedness to determine the validity of the term non-graded" as applied to some schools. (Author/RY)

To assess whether different response patterns were associated with differences in the naming and placement of response categories, 1000 undergraduate students in educational administration completed a 10-item personal-values questionnaire. (Author)

Analysis of a study conducted at the University of Houston in 1968-1969 to identify the role expectations of cooperating teachers involved in the laboratory phase of the teacher education program. (Author/RY)

Ability to distinguish intention from accident and understanding of unconscious intention were examined in preschool, kindergarten, and third-grade-age children. (Author)

Results indicate that the pattern of acquisition of noun plurals in English is comparable for both children having English as their first language and those acquiring English as a second language. (Authors)

Leftist students at the University of Puerto Rico are similar to New Left American students in father's political attitudes, religious attitudes, school enrollment, and intelligence. There exists an active leftist student organization which has grown in size and political prominence. (DM)