We present general results on D-optimal designs for estimating the mean response in repeated measures growth curve models with metric outcomes. For this situation, we derive a novel equivalence theorem checking design optimality. The motivation of work originates from designing study psychological item testing multiple retests to measure improvement ability. Besides introductory linear curves w...

Brewer and Unsworth (2012) reported that individuals with low episodic memory ability exhibit a larger testing effect, a finding with potentially important educational implications [Brewer, G. A., and Unsworth, N. (2012). Individual differences in the effects of retrieval from long-term memory. Journal of Memory and Language 66, 407-415]. We conducted two replication attempts of that study. Exp...

Brewer and Unsworth (2012) reported that individuals with low episodic memory ability exhibit a larger testing effect, a finding with potentially important educational implications. We conducted two replication attempts of that study. Exp 1 (n = 120) drew from a broad demographic sample and was conducted online, while Exp 2 (n = 122) was conducted in the lab with undergraduate students. Both ex...

The difficulty of assessing the writing skill is well known. Different testing facets seem to affect the result of assessing the writing skill. In addition to the writer’s ability, the topic of the writing task, and methods of rating may contribute to the writer’s score. In this study, 50 EFL learners wrote four different types of writing tasks (convincing, describing, instructing, and explaini...