scaled test forward and backward digit span scoring

There are lots of intrinsic and extrinsic factors that influence memory span measurements generally (including digit span cf. The particular procedure presents up to *16* digits, so it's perfectly possible to receive a score of 8, 9, 10 or even above. Application of this cutoff score to a non-litigating mild brain injury group yielded a 77 correct classification rate. A cutoff score of less than or equal to 7 accurately classified 75 of persons in the incomplete effort group and 69 of persons in the TBI group. The new digit span assessment measure, ML, is set to the maximal length of digits correctly recalled during 14 trials. The Digit Span scaled score was found to be the best discriminating index. Because the digit span assessment does not exit when TE_ML is set - as is done in traditional digit span assessments- but goes on for the remainder of the 14 trials, it is possible for participants to superpass levels they previously failed (e.g participant with TE_ML = 7 may successfully recall 8 digits on a later try). if participant reaches level 8, but answers incorrectly both times, the TE_ML is set to 7). Also from the script's comments: The first time a participant makes a consecutive error, the traditional measure TE_ML is set to the last correctly recalled number of digits (e.g. That procedure differs from other, more traditional Digit Span measurement tasks you may find in the literature. Journal of Clinicial and Experimental Neuropsychology, 33, 101-111. The particular procedure the script implements is the one from Woods, D.L. bMS = The BACKWARD digit span that a participant is expected to get correct 50% of all times based on overall performance during all 14 trials. It is set to 0 before the start of the assessment. bML = Maximal BACKWARD digit span that a participant recalled correctly during all 14 trials. bTE_TT = Two-error total trials, the number of trials before BACKWARD TE_ML is reached (measure of consistency), is set to -1 before the start of the assessment. It is set to -1 before the start of the assessment. It is the last digitspan a participant gets correct before making two consecutive errors. bTE_ML = Two-error maximum length, the traditional measure of a participant's BACKWARDS digit span. fMS = The FORWARD digit span that a participant is expected to get correct 50% of all times based on overall performance during all 14 trials. fML = Maximal FORWARD digit span that a participant recalled correctly during all 14 trials, it is set to 0 before the start of the assessment. fTE_TT = Two-error total trials, the number of trials before FORWARD TE_ML is reached (measure of consistency), is set to -1 before the start of the assessment. The dependent variables that particular script calculates are (from the script's comments): fTE_ML = Two-error maximum length, the traditional measure of a participant's FORWARD digit span.

Scaled test forward and backward digit span scoring