What describes sensory memory?

• A. Capacity: 4-7 chunks, Duration: Permanentish
• B. Capacity: Infinite, Duration: 0.5-3 seconds
• C. Capacity: 3-7 items, Duration: 5-15 seconds
• D. Capacity: Limited, Duration: Very short

Answer: (B)

Sensory memory is characterized primarily by its fleeting nature and initial storage of sensory information. The capacity of sensory memory is considered to be potentially infinite due to the vast amount of sensory input that can be registered momentarily. The duration is critical to its definition; sensory memory lasts only a very short time, typically between 0.5 to 3 seconds. This means that while sensory memory can capture a large amount of information, it does so only for a brief moment before that information is either processed into short-term memory or fades away.

The specifics of sensory memory highlight its role as an initial stage in the memory process, acting as a buffer for incoming sensory information. This brief retention allows the individual to perceive the stimuli before conscious attention is given, facilitating a more coherent understanding of the environment.