片側詐聴の定量的一診断法
1964 年 57 巻 1 号 p. 38-50
詳細
1964 年 57 巻 1 号 p. 38-50
Five typical cases of unilateral malingering claiming a disability insurance were described.
Unreliable history, unreasonable shift of the audiometric curve, inconsistent results of the TTS test and an absence or an abnormal pattern of shadow hearing gave us the first clue to be alert for the possibility of malingering in all cases (Fig. 1, 2, 3, 4).
Moor's test was usually negative, but some malingerers responded with increase in the bone conduction threshold when the external auditory meatus of the worse ear stopped up with a plug (Fig. 5).
Stenger's test was positive in all cases. Using the modified Stenger-Weiland test, it was possible to measure air conduction threshold of the worse ear in cases of unilateral aggravated or simulated deafness. In this test, we tempted malingerers to deny hearing, when the sound from bilateral receivers could be heard on the worse ear and even though in the median plane. By doing this, some reasonable approximation to the true threshold was obtained (Fig. 6 A, B, C, D, F). The result was confirmed by experiments in other patients and students, and the condition necessitating noise masking was also discussed (Fig. 7 A, B, C, D).
