Benchmark‐based strategies in whole number line estimation
Benchmark‐based strategies in whole number line estimation
复制标题
基于基准的整数线估计策略
DOI：
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发表时间：
2017
影响因子：
4
通讯作者：
K. Luwel
中科院分区：
文献类型：
--
作者：
D. Peeters;L. Verschaffel;K. Luwel
在这项研究中，我们使用口头协议来确定成年人是否自发地应用基于四分位数的策略，或者他们在解决0- 1，000数字线估计（NLE）任务时是否需要额外的外部支持来使用这些策略。参与者被分配到三个条件之一的基础上提供的外部基准数的数字线。在有界条件下，仅指示原点和终点，中点条件包括50%的额外外部基准，而在四分位数条件下，指定25%、50%和75%的三个额外外部基准。首先，在有界条件下的参与者自发地应用基于四分位数的策略来校准他们的估计。此外，参与者经常依赖外部基准来创建数字线中点、四分位数甚至八分位数的内部基准。第二，随着外部基准数目的增加，总体估计准确性提高，接近外部基准的目标数目估计得更准确，变异性更小。第三，使用更大的品种在基准为基础的战略是积极相关的NLE的准确性。总之，这项研究提供的证据表明，NLE任务诱导更复杂的策略使用的参与者比最初预期的。
In this study, we used verbal protocols to identify whether adults spontaneously apply quartile-based strategies or whether they need additional external support to use these strategies when solving a 0-1,000 number line estimation (NLE) task. Participants were assigned to one of three conditions based on the number of external benchmarks provided on the number line. In the bounded condition only the origin and endpoint were indicated, the mid-point condition included an additional external benchmark at 50%, and in the quartile condition three additional external benchmarks at 25%, 50%, and 75% were specified. Firstly, participants in the bounded condition reported to spontaneously apply quartile-based strategies to calibrate their estimates. Moreover, participants frequently relied on the external benchmarks for creating internal benchmarks at the mid-point, quartiles, and even octiles of the number line. Secondly, overall estimation accuracy improved as the number of external benchmarks increased, and target numbers close to external benchmarks were estimated more accurately and with less variability. Thirdly, the use of a larger variety in benchmark-based strategies was positively related to NLE accuracy. In summary, this study provides evidence that the NLE task induces more sophisticated strategy use in participants than initially anticipated.
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