Schiavetti N, Sacco P R, Metz D E, Sitler R W
J Speech Hear Res. 1983 Dec;26(4):568-73. doi: 10.1044/jshr.2604.568.
The appropriateness of direct magnitude estimation and interval scaling for assessing stuttering severity was investigated by determining whether the continuum of the stutterers' judged severity was prothetic or metathetic. As operationally defined by Stevens, prothetic continua show a curvilinear relation between magnitude estimates and interval scale values of the same set of stimuli, whereas metathetic continua show a linear relation between these scale values. The stuttering severity of 20 stutterers was scaled by three groups of 15 listeners who used interval scaling, direct magnitude estimation with standard/modulus, and direct magnitude estimation without standard/modulus. The results indicated that the two sets of direct magnitude estimation scale values were related to the interval scale values in the curvilinear fashion that is typical of prothetic continua. These findings suggest that direct magnitude estimation is preferable to interval scaling for measuring stuttering severity.
通过确定口吃者判断的严重程度连续体是增补性的还是转换性的，来研究直接量值估计和区间标度法在评估口吃严重程度方面的适用性。按照史蒂文斯的操作性定义，增补性连续体在同一组刺激的量值估计和区间标度值之间呈现曲线关系，而转换性连续体在这些标度值之间呈现线性关系。20名口吃者的口吃严重程度由三组15名听众进行标度，他们分别使用区间标度法、带标准/模数的直接量值估计法和不带标准/模数的直接量值估计法。结果表明，两组直接量值估计标度值与区间标度值呈曲线关系，这是增补性连续体的典型特征。这些发现表明，在测量口吃严重程度方面，直接量值估计比区间标度法更可取。
