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Exploring approach motivation: Correlating self-report, frontal asymmetry, and performance in the Effort Expenditure for Rewards Task.
Cognitive, Affective, & Behavioral Neuroscience ( IF 2.9 ) Pub Date : 2020-09-15 , DOI: 10.3758/s13415-020-00829-x
Imogen Kaack 1 , Jungwoo Chae 1 , Shabah Mohammad Shadli 1 , Kristin Hillman 1
Affiliation  

Frontal EEG asymmetry has been investigated as a physiological metric of approach motivation, with higher left frontal activity (LFA) suggested to reflect approach motivation. However, correlations between LFA and traditional metrics of approach motivation (e.g., scores from the behavioral inhibition system/behavioral approach system [BIS/BAS] survey) are inconsistent. It is also not clear how LFA correlates to approach motivation on an observable, behavioral level. Here, we tested correlations between BIS/BAS scores, LFA, and performance in the Effort Expenditure for Rewards Task (EEfRT). In our sample (n = 49), BIS/BAS results did not correlate to LFA values (resting or task states), and were also unrelated to EEfRT performance variables. We found evidence of significant and distinct correlations between LFA and EEfRT performance. Resting-state LFA positively correlated to effort expenditure on lower utility trials, where reward size and/or probability were suboptimal. Task-onset LFA captured in the first 5 min of the task was related to overall behavioral performance in the EEfRT. High task-onset LFA correlated to high trial completion rates, high-effort trial selection percentages, and overall monetary earnings. One interpretation of these initial findings is that resting-state LFA reflects approach tendencies to expend effort, but that this extends to suboptimal situations, whereas task-state LFA better reflects effortful approach toward high-utility goals. Given the relatively small sample size and the risk of Type I/II errors, we present the study as exploratory and the results as preliminary. However, the findings highlight interesting initial links between LFA and EEfRT performance. The need for larger replication studies is discussed.



中文翻译:

探索方法动机:将自我报告、额叶不对称和奖励任务的努力支出相关联。

额叶脑电图不对称性已被研究作为接近动机的生理指标,建议较高的左额叶活动 (LFA) 反映接近动机。然而,LFA 与传统方法动机指标(例如,来自行为抑制系统/行为方法系统 [BIS/BAS] 调查的分数)之间的相关性是不一致的。也不清楚 LFA 如何与可观察的行为水平上的动机相关联。在这里,我们测试了 BIS/BAS 分数、LFA 和奖励任务工作量支出 (EEfRT) 中的表现之间的相关性。在我们的样本中 ( n= 49),BIS/BAS 结果与 LFA 值(休息或任务状态)无关,也与 EefRT 性能变量无关。我们发现了 LFA 和 EefRT 性能之间显着且明显的相关性的证据。静息状态 LFA 与较低效用试验的努力支出呈正相关,其中奖励大小和/或概率是次优的。在任务的前 5 分钟捕获的任务开始 LFA 与 EefRT 的整体行为表现有关。高任务开始 LFA 与高试验完成率、高努力试验选择百分比和整体货币收入相关。对这些初步发现的一种解释是,静息状态的 LFA 反映了花费精力的方法倾向,但这扩展到次优情况,而任务状态 LFA 更好地反映了实现高效用目标的努力方法。鉴于样本量相对较小且存在 I/II 类错误的风险,我们将研究呈现为探索性,结果呈现为初步结果。然而,研究结果强调了 LFA 和 EefRT 性能之间有趣的初始联系。讨论了进行更大规模复制研究的必要性。

更新日期:2020-09-15
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