La Barbera Francesco, Ajzen Icek
Department of Political Sciences, University of Naples Federico II, Naples, Italy.
Department of Psychological and Brain Sciences, University of Massachusetts Amherst, Amherst, MA, USA.
Eur J Psychol. 2020 Aug 31;16(3):401-417. doi: 10.5964/ejop.v16i3.2056. eCollection 2020 Aug.
Research with the theory of planned behavior (TPB) has typically treated attitude (ATT), subjective norm (SN), and perceived behavioral control (PBC) as independent predictors of intention (INT). However, theoretically, PBC moderates the effects of ATT and SN on intention. In three studies dealing with different behaviors (voting, reducing household waste, and energy consumption) we show that greater PBC tends to strengthen the relative importance of ATT in the prediction of intention, whereas it tends to weaken the relative importance of SN. The latter pattern was observed in relation to injunctive as well as descriptive subjective norms, and it may help explain the relatively weak relation between SN and INT frequently observed in TPB studies.
基于计划行为理论（TPB）的研究通常将态度（ATT）、主观规范（SN）和感知行为控制（PBC）视为意图（INT）的独立预测因素。然而，从理论上讲，PBC会调节ATT和SN对意图的影响。在三项针对不同行为（投票、减少家庭垃圾和能源消耗）的研究中，我们发现，较高的PBC往往会增强ATT在预测意图方面的相对重要性，而它往往会削弱SN的相对重要性。后一种模式在涉及指令性和描述性主观规范时均被观察到，它可能有助于解释在TPB研究中经常观察到的SN与INT之间相对较弱的关系。
