Correlational study and randomised controlled trial for understanding and changing red meat consumption: The role of eating identities
Correlational study and randomised controlled trial for understanding and changing red meat consumption: The role of eating identities
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DOI：
10.1016/j.socscimed.2017.01.005
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发表时间：
2017-02-01
影响因子：
5.4
通讯作者：
Conner, M.
中科院分区：
文献类型：
--
作者：
Carfora, V.;Caso, D.;Conner, M.
理论基础：本研究旨在为减少红肉摄入量(RMC)涉及的心理变量的文献做出贡献。目的：研究1调查计划行为理论(TPB)加上健康饮食和吃肉身份，是否可以解释减少RMC的意图。研究2评价短信干预对降低RMC的自我监测效果。方法：研究1采用为期一周的在线饮食日记和TPB问卷收集数据。研究2是一项随机对照试验，通过在线食物日记和问卷在一周的时间内评估RMC和TPB前后的结构。每个研究的参与者都是意大利本科生(研究1：n=405；研究2：n=244)。在研究2中，参与者被随机分配到控制组和消息条件组。消息条件组的参与者每天收到一条短信，提醒他们监测RMC，而对照组的参与者没有收到任何消息。结果：研究1表明，情感态度、工具性态度、知觉行为控制和食肉认同感可以解释降低RMC的意图，而主观规范、既往行为和健康饮食认同感不能解释RMC。研究2表明，短信干预在增加意向和降低RMC方面是有效的。中介分析表明，通过健康饮食、食肉身份和意图进行部分串联调节。结论：本研究支持TPB在解释降低RMC意图方面的预测效度，并支持以自我监控为目标的短信干预在降低RMC方面的有效性。研究结果证实了饮食身份在解释降低RMC的意图和改变这一行为方面的重要作用。(C)2017爱思唯尔有限公司。保留所有权利。
Rationale: The present studies aimed to contribute to the literature on psychological variables involved in reducing red meat consumption (RMC).Objective: Study 1 investigated whether the theory of planned behaviour (TPB), plus healthy-eating and meat-eating identities, could explain intentions to reduce RMC. Study 2 evaluated the effectiveness of an SMS text message intervention on self-monitoring to reduce RMC.Methods: In Study 1, data were collected daily using online food diaries for one week and a TPB questionnaire. Study 2 was a randomised controlled trial assessing pre- and post-RMC and TPB constructs by online food diaries and questionnaires over a one-week period. Participants were Italian undergraduates in each study (Study 1: N = 405; Study 2: N = 244). In Study 2, participants were randomly allocated to control and message condition groups. Participants in the message condition group received a daily SMS, which reminded them to monitor RMC, while participants in the control group did not receive any message. Only students who completed all measures were considered in the analyses (Study 1: N = 342; Study 2: N = 228).Results: Study 1 showed that affective and instrumental attitudes, perceived behavioural control, and meat-eating identity explained intentions to reduce RMC, while subjective norm, past behaviour, and healthy-eating identity did not. Study 2 showed that an SMS intervention was effective in increasing intentions and reducing RMC. Mediation analyses indicated partial serial mediation through healthy eating and meat-eating identities and intentions.Conclusion: The present studies provide support for the predictive validity of TPB in explaining intentions to reduce RMC and for the efficacy of an SMS intervention targeting self-monitoring in reducing RMC. Findings confirmed the important role of eating identities in explaining intentions to reduce RMC and in changing this behaviour. (C) 2017 Elsevier Ltd. All rights reserved.