强迫选择实验中的心理测量函数研究

被引:3
作者
罗涛
牟轩沁
闫浩
机构
[1] 西安交通大学图像处理与模式识别研究所
基金
高等学校博士学科点专项科研基金;
关键词
强迫选择实验; 心理测量函数; 最大似然拟合;
D O I
暂无
中图分类号
B841 [心理学研究方法];
学科分类号
040201 ;
摘要
为了评价观察者在视觉检测实验中的感知能力,提出一种含约束条件的最大似然拟合方法.该方法通过强迫选择实验获得不同视觉刺激强度下的主观识别率,通过离差分析筛选出有效的实验数据,然后采用最大似然准则拟合出识别率与刺激强度的函数关系.实验建立了2选项和4选项强迫选择实验的心理测量函数,其中刺激信号的面积覆盖100~400 mm2.实验结果表明:拟合的均方误差在0.05附近,决定系数近似为0.9;两位观察者的心理测量函数的最大误差是0.046 6;相比非线性最小二乘拟合,最大似然拟合具有更高的拟合准确率.
引用
收藏
页码:104 / 108
页数:5
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