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目的编制青少年水果蔬菜摄入行为-心理测定量表,评价其信度和效度。方法采用多阶段抽样法对三个城市3600名中学生进行问卷调查。用Cronbach’sα系数和分半信度检验其信度;用探索性因子分析和验证性因子分析检验其结构效度,用条目-维度相关系数(IIC)、维度间相关系数、总分与维度间的相关系数检验内容效度。结果该量表的Cronbach’sα系数为0.917,改变策略、决策平衡正向效应、决策平衡负向效应、自我效能四个维度的Cronbach’sα系数分别为0.917、0.869、0.679、0.846;总量表的分半信度为0.929,各分半信度在0.312~0.882;探索性因子分析显示:三个维度的条目分别全部被纳入,且累计贡献率均大于50%;验证性因子分析显示:绝对拟合优度指标中GFI=0.983、AGFI=0.971、RMSEA=0.030(90%可信区间=0.028-0.032)均满足条件,模型拟合较好;IIC结果显示,四个维度与所含条目之间的Spearman相关系数的范围分别为0.508~0.778、0.719~0.825、0.561~0.790、0.659~0.779,各维度之间有中度的相关关系,r值范围0.474~0.597。结论青少年水果蔬菜行为-心理测定量表在中学生中具有较好的信度和效度,在整体上适用于国内青少年水果蔬菜行为-心理的测量。
Objective To prepare juvenile fruit and vegetable intake behavior-psychometric scale and evaluate its reliability and validity. Methods A multi-stage sampling method was used to survey 3,600 middle school students in three cities. The Cronbach’s α coefficient and the half-confidence level were used to test the reliability of the model. Exploratory factor analysis and confirmatory factor analysis were used to test the validity of the structure. Item-dimensional correlation coefficient (IIC), inter-dimension correlation coefficient, total score and dimension Correlation coefficient between the test content validity. Results The Cronbach’sα coefficient of the scale was 0.917. The Cronbach’s alpha coefficients of the four dimensions of change strategy, decision-making balanced positive effect, decision-making negative balance and self-efficacy were 0.917,0.869,0.679,0.846 respectively; , Respectively. The results of exploratory factor analysis showed that all the items in three dimensions were all included, and the cumulative contribution rate was more than 50%. The confirmatory factor analysis showed that the absolute The goodness of fit indicators of GFI = 0.983, AGFI = 0.971, RMSEA = 0.030 (90% confidence interval = 0.028-0.032) all satisfy the conditions and the model fitting is good. The IIC results show that the four dimensions The Spearman correlation coefficients ranged from 0.508 to 0.778, 0.719 to 0.825, 0.561 to 0.790, and 0.659 to 0.779, respectively. There was a moderate correlation between each dimension, with r values ranging from 0.474 to 0.597. Conclusion The results of behavioral-psychological test of young fruits and vegetables have good reliability and validity among middle school students, and are generally applicable to the behavioral-psychological measurement of fruit and vegetable in young people in China.