Backward digit span test race12/31/2023 ![]() The latter prediction is derived from the hypothesis that the magnitude of racial differences should be a function of the degree to which Level 2 predominates in the cognitive demands of the particular test. From the two-level theory of mental abilities (Level 1: rate learning and memory, involving little or no transformation of the input Level 2: complex cognitive processing involving transformation and mental manipulation of input) it was predicted that forward digit span (FDS) should correlate less with IQ than backward digit span (BDS), and age and race should interact with FDS-BDS, with the FDS-BDS difference decreasing as a function of age and a greater white-black difference in BDS than in FDS. ![]() |aThe study sought to use Jensen's two-level theory of mental abilities to predict some hitherto unknown or unnoticed phenomena-facts about which the theory should yield clear-cut predictions and which are not as clearly predictable from other theories, though they may receive ad hoc explanations after the fact. |a : |bDistributed by ERIC Clearinghouse, |c1975. |aForward and Backward Digit Span Interaction with Race and IQ |h : |bPredictions from Jensen's Theory / |cArthur R. | Jensen (Arthur R) Wechsler Intelligence Scale for Children | Recall (Psychology) | Retention (Psychology) | Rote Learning. : ERIC Clearinghouse microfiches : positive.Īssociative Learning. Supplementary studies found no support for rival hypotheses based on anxiety, task difficulty, and race of examiner. The predictions were substantiated at a high level of significance in large representative samples of white and black children of ages 5-12 years, who were given the Wechsler Intelligence Scale for Children (Revised). The study sought to use Jensen's two-level theory of mental abilities to predict some hitherto unknown or unnoticed phenomena-facts about which the theory should yield clear-cut predictions and which are not as clearly predictable from other theories, though they may receive ad hoc explanations after the fact. : Distributed by ERIC Clearinghouse, 1975 UPDATE: Oops! The scoring starts at two digits rather than one, so Krauthammer's extrapolated raw score would be 48 (11 x 2 + 13 x 2) and his standard score 206, which is "only" seven standard deviations above the mean.Broken link? let us search Trove, the Wayback Machine or Google for you. Krauthammer's raw score equates to a standard score (one component of Weschler IQ) of.well the scale stops at 164 for a raw score of 36! The standard score increments a steady 3.5 points for every additional point of raw score so we can extrapolate a raw score of 52 to a Weschler deviation IQ of about 220! However, this would place Krauthammer at eight standard deviations above the mean (rarer than one in 100 billion), so I think we can safely conclude that A) Krauthammer is a very bright guy and B) that either this test is not well-calibrated for extremes or that Krauthammer's every political opination is nothing less than a scurrilous defrauding of all mankind. To roughly extrapolate Krauthammer's full score we must multiply his digits-backwards score by two and add his estimated digits-fowards score times two (12 x 2 + 14 x 2), which equals 52. The scoring system requires adding forwards and backwards scores together, but helpfully notes that the average person can recite about two more digits forwards than backwards. A quick search turned up this scoresheet and percentile distribution (PDF) for the digits-forward and backward tests, which involve reciting strings of random single-digit numbers back to the examiner. While browsing through the footnotes of Charles Murray's latest Commentary magazine essay on race and IQ differences I ran across an interesting bit of trivia on Charles Krauthammer: Murray mentions that one of the highest scores he's ever observed on the "backward digit span" component of the Weschler IQ test was 12 by Krauthammer (and under less than perfect conditions).
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |