MECHANISM OF AGE-RELATED DIFFERENCES IN FREQUENCY DISCRIMINATION WITH BACKWARD-MASKING - SPEED OF PROCESSING OR STIMULUS PERSISTENCE
MECHANISM OF AGE-RELATED DIFFERENCES IN FREQUENCY DISCRIMINATION WITH BACKWARD-MASKING - SPEED OF PROCESSING OR STIMULUS PERSISTENCE
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DOI：
10.1037/0882-7974.5.4.475
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发表时间：
1990-12-01
影响因子：
3.7
通讯作者：
MOBERG, PJ
中科院分区：
文献类型：
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作者：
RAZ, N;MILLMAN, D;MOBERG, PJ
在实验1中，频率辨别阈值估计在2间隔，强制选择，后向掩蔽程序与掩蔽声不同的目标。年轻的受试者比年长的受试者更有效地逃避掩蔽的影响。在实验2中，年轻和老年受试者执行相同的任务，掩蔽声类似的目标和目标不同的掩蔽声。在目标相似掩蔽和短目标掩蔽间隔下，老年人表现出显着的改善，达到年轻人的表现水平，而在目标不同掩蔽下，恢复了与年龄相关的差异。与年龄相关的信息处理速度减慢和刺激持久性增加可以解释实验1的结果，但只有增加刺激持久性解释实验2的结果。
In Experiment 1, frequency-discrimination thresholds were estimated in a 2-interval, forced-choice, backward masking procedure with a masker acoustically dissimilar to the targets. Young subjects were more efficient in escaping the effects of masking than were their elderly counterparts. In Experiment 2, young and elderly subjects performed the same task, with a masker acoustically similar to the targets and with a target-dissimilar masker. Under target-similar masking and at short target–masker intervals, the elderly demonstrated significant improvement, reaching the level of performance of the young, whereas under the target-dissimilar masker, the age-related differences were restored. Both age-related slowing of information processing and increase in stimulus persistence can account for the results of Experiment 1, but only increased stimulus persistence explains the results of Experiment 2.