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These results have implications for our understanding of visuospatial memory in dyslexia, and also in terms of the administration of the Corsi task to special populations. Total number managed (ticks) backwards and forwards added together. Abstract This study investigated the relationship between the three components of WAIS-IV Digit Span subtest: Digit Span Forward (DSF), Digit Span Backward (DSB), and Digit Span. Our data suggest that, without instruction, people with dyslexia are unable to adopt an effective CB strategy and this is consistent with a deficit in executive function. We present three studies which indicate a consistent dyslexic deficit on CB that can be ameliorated by visual strategy instructions. In the experimental trials, the mean proportion of lists correctly recalled. While people with dyslexia typically show no deficit on CF, CB is rarely presented. Mean digit span at pre-test was 6.1 for forward recall and 5.4 for backward recall. Previous research has suggested that, while CF draws on spatial-sequential resources, CB may load executive and distinctly visual processes. In a widely used measure, the Corsi blocks task, sequences of visuospatial locations can be recalled forwards, in the order presented (CF), or backwards, in reverse order (CB). It assesses childrens ability to hold information in short-term memory and. However, the situation regarding visuospatial memory is less clear. The Digit Span Task (Backwards-Only Child Version) measures working memory. The task consists of two items, forwards and backwards, and each item is composed of two trials of eight questions each. In Digits Forward, the child listens to and repeats a sequence of numbers spoken aloud by the interviewer. It assesses children’s ability to hold information in short-term memory and manipulate that information to produce some result. Impairments in working memory are suggested to be one of the defining characteristics of dyslexia, and deficits in verbal recall are well documented. The Digit Span Task (Backwards-Only Child Version) measures working memory.