Question

As annalisa is sitting in her bedroom listening to the radio, she notices that it suddenly sounds louder. she looks and is not surprised to find her little sister turning up the volume. how could annalisa tell that the radio became louder before she saw what her sister was doing?

Answer 1

Answer: It Exceeded her difference threshold.

Explanation: Difference threshold is the described as just noticeable difference that is detected when the sensation, volume, perception of something gets changed from one state to other. It is the smallest difference that human can sense.

According to the question, Annalisa experienced the raise in the volume of radio because is it effected her difference threshold. She noticed the slight change that happened to raise the volume because she sensed the volume.

Answer 2

I believe the answer is: bottom-up processing

bottom-up processing refers to the process of perception that start by identifying the stimulus that felt by our sensory input and move up to found the source of that stimulus.
In the scenario above, the radio voice is the stimulus that feld by Annalisa's auditory input. After feeling that, Annalisa analyze the situation to see that the increasing volume is the cause of that stimulus,