Abstract
Simple arithmetic problems with repeated operands (i.e., ties such as 4+4, 6 × 6, 10-5, or 49 ÷ 7) are solved more quickly and accurately than similar nontie problems (e.g., 4 +5, 6 × 7, 10-6, or 48÷ 6). Further, as compared with nonties, ties show small or nonexistent problem-size effects (whereby problems with smaller operands such as 2 + 3 are solved more quickly and accurately than problems with larger operands such as 8 + 9). Blankenberger (2001) proposed that the tie advantage occurred because repetition of the same physical stimulus resulted in faster encoding of tie than of nontie problems. Alternatively, ties may be easier to solve than nonties because of differences in accessibility in memory or differences in the solution processes. Adults solved addition and multiplication (Experiment 1) or subtraction and division (Experiment 2) problems in four two pure formats (e.g., 4 + 4, FOUR + FOUR) and two mixed formats (e.g., 4 + FOUR, and FOUR + 4). Tie advantages were reduced in mixed formats, as compared with pure formats, but the tie × problem-size interaction persisted across formats. These findings support the view that tie effects are strongly related to memory access and are influenced only moderately by encoding factors.
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This research was supported by a grant from the Natural Sciences and Engineering Research Council of Canada to J. L. Portions of the data were presented at the annual meetings of the Canadian Society for Brain, Behaviour, and Cognitive Science in Vancouver, May–June 2002.
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LeFevre, Ja., Shanahan, T. & DeStefano, D. The tie effect in simple arithmetic: An access-based account. Memory & Cognition 32, 1019–1031 (2004). https://doi.org/10.3758/BF03196878
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DOI: https://doi.org/10.3758/BF03196878