The internal reliability of the Speech Sounds Perception Test was examined in two independent samples. Both indicated a significantly greater number of errors on the first half of the test; the largest number of errors occurred on Subtests B and A. Reliability coefficients and a performance classification formula are discussed. (Author/CM)

Using 146 high school students, this research assessed the effects of aptitude, strategy training, and item characteristics on the strategic processes employed in the performance of spatial visualization tasks. Treatment effects were shown to depend on the subject's aptitude profile and on the characteristics of items. (BS)