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Children's Strategy Choices on Complex Subtraction Problems: Individual Differences and Developmental Changes.

ABSTRACT: We examined how children's strategy choices in solving complex subtraction problems are related to grade and to variations in problem complexity. In two studies, third- and fifth-grade children (N?160 each study) solved multi-digit subtraction problems (e.g., 34-18) and described their solution strategies. In the first experiment, strategy selection was investigated by means of a free-choice paradigm, whereas in the second study a discrete-choice approach was implemented. In both experiments, analyses of strategy repertoire indicated that third-grade children were more likely to report less-efficient strategies (i.e., counting) and relied more on the right-to-left solution algorithm compared to fifth-grade children who more often used efficient memory-based retrieval and conceptually-based left-to-right (i.e., decomposition) strategies. Nevertheless, all strategies were reported or selected by both older and younger children and strategy use varied with problem complexity and presentation format for both age groups. These results supported the overlapping waves model of strategy development and provide detailed information about patterns of strategy choice on complex subtraction problems.

SUBMITTER: Caviola S

PROVIDER: S-EPMC6057409 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature

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Children's Strategy Choices on Complex Subtraction Problems: Individual Differences and Developmental Changes.

Caviola Sara S Mammarella Irene C IC Pastore Massimiliano M LeFevre Jo-Anne JA

Frontiers in psychology 20180717

We examined how children's strategy choices in solving complex subtraction problems are related to grade and to variations in problem complexity. In two studies, third- and fifth-grade children (N≈160 each study) solved multi-digit subtraction problems (e.g., 34-18) and described their solution strategies. In the first experiment, strategy selection was investigated by means of a <i>free-choice</i> paradigm, whereas in the second study a <i>discrete-choice</i> approach was implemented. In both e ...[more]

PMID: 30065686

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Project description:BackgroundAs interest in evaluating sex differences in nonhuman animals grows, the finding that male and female monkeys have toy preferences that differ, and that parallel those documented in human children, has garnered significant attention and is leveraged as an argument in favor of a biological contribution for human sex differences. To date, however, only two studies have investigated sex differences in monkeys' toy preferences, both documenting that males prefer toys considered to be "masculine" (such as vehicles) and females prefer toys considered to be "feminine" (such as dolls). Monkeys in these studies were tested in their social groups, making it hard to determine if the sex differences reported reflect actual individual preferences or result from social dynamics present at the time of testing.MethodHere, we assessed the preferences of 14 rhesus macaques (N = 7 males; N = 7 females) who were singly tested in a choice test with a variety of toys characterized as masculine (hard non-zoomorphic wheeled toys), feminine (zoomorphic soft toys), neutral (hard non-zoomorphic toys) and ambiguous (zoomorphic or plush vehicles) based on criteria from previous studies.ResultsMales and females showed similar preferences for neutral and "masculine" toys and preferred them (i.e., were more likely to interact with them) to "feminine" and sex-ambiguous toys. When they interacted with the toys, both males and females interacted more with neutral than with "masculine" toys. Females, but not males, interacted more with neutral and "masculine" toys than with "feminine" toys. The highest frequency of interaction for any single toy for the male monkeys was with the doll-standing is stark contrast to previous findings.ConclusionsOur results contrast greatly with the previous study in rhesus monkeys, as well as findings in human children, suggesting that the previously documented sex differences are likely context dependent, and question the existence of a strong biological basis to sex differences in toy preferences.

Dataset Information

Children's Strategy Choices on Complex Subtraction Problems: Individual Differences and Developmental Changes.

Publications

Children's Strategy Choices on Complex Subtraction Problems: Individual Differences and Developmental Changes.

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