Thus, the Digit Sequencing test can help researchers study patients with cognitive impairment.Īttention. The usage of the Digit Sequencing test to measure attention is a controversial topic. MRI scans also indicate an activation of the prefrontal cortex during the test ( Owen et al., 2000). There’s a link established between the prefrontal cortex functions and working memory. The extra effort required in the backward version of the test can be linked to intelligence.Ĭognitive impairments. Originally designed as a part of the Wechsler Intelligence Scale, the Digit Sequencing test can indicate correlations between one’s working memory and overall intelligence. The test sheds some light on the process of encoding and receiving information, and also – on the way participants recall and verbalize their answers. As mentioned above, the Digit Span is a great tool to measure working memory and verbal working memory, in particular. The Digit Sequencing test has numerous applications in clinical practice and research. The ConductScience Digital Health mobile version of the test provides an engaging and easy-to-use platform to perform the Digit Span test.īoth options are available upon request: the ability for audible sequence priming or visual sequence priming with the ability for the respondent to answer with visual buttons on the screen. In computer-administered Digit Span tests, the digits are presented on a screen, which eliminates any verbal and reading bias. Sometimes the participant is asked to repeat the sequence of digits backward. Usually, the examiner reads a list of numbers, and the participant repeats them until an incorrect answer is given ( Blackburn, 1957). The test was originally designed to test working memory and attention, as part of the Wechsler Intelligence Scale. The Digit Sequencing or Digit Span test is one of the main tools developed to measure one’s verbal working memory. It’s accepted that the verbal working memory consists of the phonological loop and the visuospatial sketchpad. From recalling a phone number to learning a new language, the verbal working memory is a leading factor in people’s cognitive functioning. That’s not surprising: the verbal working memory plays a crucial role in one’s everyday life. Verbal working memory has been a primary focus of research. Note that usually, working memory is measured via three scales: Arithmetic, Digit Span, and Letter-Number Sequencing ( Lovett et al., 2011). Our working memory is a complicated system that allows us to process new stimuli while using old information at the same time ( Conway et al., 2005). Balances, Scales and Weighing Equipment.Findings highlight the importance of including individuals with verified TBI when evaluating and developing PVTs. This relative superiority may reflect that individuals with verified TBI are more likely to perseverate on prior instructions during DS Sequencing.
traditional RDS demonstrated the best classification accuracy with respect to specificity/sensitivity balance. Conclusion: In the context of moderate-to-severe TBI, the DS-derived PVTs showed comparable discriminability. A greater percentage of TBI scored RDS Sequencing < 1 compared to SIM and HC. HC however, the traditional RDS showed the highest sensitivity when approximating 90% specificity for SIM vs. ROC analyses indicated that RDS variables were comparable predictors of SIM vs. Post hoc contrasts revealed that only RDS Forward and the traditional RDS differed significantly between SIM and TBI. Results: Kruskal–Wallis tests indicated that all DS indices differed significantly across groups. Participants completed the WAIS-IV DS subtest in the context of a larger test battery. Methods: Participants included 64 adults with moderate-to-severe TBI (TBI), 51 healthy adults coached to simulate TBI (SIM), and 78 healthy comparisons (HC). This study compared DS-derived PVT classification accuracies in a design that included adults with verified TBI. Reports have indicated that these new performance validity tests (PVTs) are superior to the traditional RDS however, comparisons in the context of known neurocognitive impairment are sparse. Objective: The addition of Sequencing to WAIS-IV Digit Span (DS) brought about new Reliable Digit Span (RDS) indices and an Age-Corrected Scaled Score that includes Sequencing trials.
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