Question

Susan asked mary to turn up the radio, so mary increased the volume from level 5 to level 7. mary could hear the difference but susan couldn't. they differed in their:

Answer 1

They differ in their difference threshold. This is being defined when their sensory stimuli is different, making the individual perceive them also, as different. This occurs in the scenario given above for Susan couldn't hear the level 7 volume when Mary could already hear it.