Systems Factorial Technology (SFT) is a popular framework for that has been used to investigate processing capacity across many psychological domains over the past 25+ years. To date, it had been assumed that no processing resources are used for sources in which no signal has been presented (i.e., in a location that can contain a signal but does not on a given trial). Hence, response times are purely driven by the signal-containing location or locations. This assumption is critical to the underlying mathematics of the capacity coefficient measure of SFT. In this article, we show that stimulus locations influence response times even when they contain no signal, and that this influence has repercussions for the interpretation of processing capacity under the SFT framework, particularly in conjunctive (AND) tasks-where positive responses require detection of signals in multiple locations. We propose a modification to the AND task requiring participants to fully identify both target locations on all trials. This modification allows a new coefficient to be derived. We apply the new coefficient to novel experimental data and resolve a previously reported empirical paradox, where observed capacity was limited in an OR detection task but super capacity in an AND detection task. Hence, previously reported differences in processing capacity between OR and AND task designs are likely to have been spurious. (PsycInfo Database Record (c) 2020 APA, all rights reserved).

中文翻译：

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一无所有：系统因子技术中的无信号过程。

系统因子技术 (SFT) 是一种流行的框架，在过去 25 年多的时间里，它已被用于研究跨许多心理领域的处理能力。迄今为止，已经假设没有处理资源用于未呈现信号的源（即，在可以包含信号但在给定试验中不包含信号的位置）。因此，响应时间完全由包含信号的位置决定。该假设对于 SFT 容量系数度量的基础数学至关重要。在本文中，我们表明，即使刺激位置不包含任何信号，它们也会影响响应时间，并且这种影响会对 SFT 框架下处理能力的解释产生影响，特别是在联合 (AND) 任务中——积极响应需要在多个位置检测信号。我们建议修改 AND 任务，要求参与者在所有试验中完全识别两个目标位置。这种修改允许推导出新的系数。我们将新系数应用于新的实验数据并解决了先前报告的经验悖论，其中观察到的容量在 OR 检测任务中受到限制，但在 AND 检测任务中具有超大容量。因此，先前报告的 OR 和 AND 任务设计之间处理能力的差异可能是虚假的。（PsycInfo 数据库记录 (c) 2020 APA，保留所有权利）。这种修改允许推导出新的系数。我们将新系数应用于新的实验数据并解决了先前报告的经验悖论，其中观察到的容量在 OR 检测任务中受到限制，但在 AND 检测任务中具有超大容量。因此，先前报告的 OR 和 AND 任务设计之间处理能力的差异可能是虚假的。（PsycInfo 数据库记录 (c) 2020 APA，保留所有权利）。这种修改允许推导出新的系数。我们将新系数应用于新的实验数据并解决了先前报告的经验悖论，其中观察到的容量在 OR 检测任务中受到限制，但在 AND 检测任务中具有超大容量。因此，先前报告的 OR 和 AND 任务设计之间处理能力的差异可能是虚假的。（PsycInfo 数据库记录 (c) 2020 APA，保留所有权利）。