Lengthening the interval between dictated digits markedly lowered children's memory span scores on one testing day¶

Claim · All claims
Evidence · 1 study · associational r1 · q2
Currency · newest study 1918 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? When one experimenter consciously lengthened the time between digits on the third trial, not one of the children he tested reached a Consecutive Series score higher than four. → Mitchell 1918

Evidence¶

Mitchell 1918¶

Mitchell, David. (1918). Variability in Memory Span. The Journal of Educational Psychology. https://www.google.com/search?q=%22Variability+in+Memory+Span%22+Mitchell+1918

q2 · i? · associational · r1

Incidental observation during the ten-day study: on the third trial one experimenter changed his procedure by lengthening the interval between digits. The article reports "The result was quite marked;—not one of the children with whom he worked succeeded in .getting a "Consecutive Series" score higher than four on that day."

"The result was quite marked;—not one of the children with whom he worked succeeded in .getting a "Consecutive Series" score higher than four on that day."

Discussion¶

Related Claims¶

• Individual children's memory span scores vary considerably between two testings five weeks apart — related
• Test-retest correlations of memory span are low, questioning the validity of a single memory span test — related
• The digit series used was too short, with 73 of 970 trials reaching the maximum score of ten — related
• The study's conclusions rest on only sixty-five individually tested unretarded cases, limiting generalization — related