Study the given information carefully and answer the given question Following are the observations o...........

Logical Reasoning (RBI) Statement - Conclusions

Study the given information carefully and answer the given question. Following are the observations of an experiment on 'sleep and memory' conducted on 18 healthy young adults (ages 18 to 25) and 18 healthy older adults (ages 61 to 81).

A. The recall after 8 hours of sleep in younger adults was 65% more than that in the older adults.

B. Night-sleep had a higher negative impact on all of the participants as compared to that of day sleep of equal duration.

C. If a given set of words is memorised immediately before going to sleep, its recall after waking up was found to be better in younger adults than in older adults.

Which of the following can be concluded from the given findings of the research?

I. As per the experiment, there is some correlation between sleep and memory.

II. The part of the brain involved in memory is more active during the day as compared to that during the night.

III. A sleep of more than 8 hours can improve memory in older adults. IV. Memorising something immediately after waking up from an 8-hour long sleep will yield better results than memorising before sleep.

This questions was previously asked in

RBI Grade B 2016

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Only IV

Both I and III

Both II and IV

None of these

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Explanation:

Correct option 4: None of these

Given information summary:

Younger adults recall 65% more than older adults after 8 hours of sleep.

Day-sleep is more beneficial than night-sleep (night-sleep had a higher negative effect).

Recall is better when words are memorised immediately before sleep, and younger adults perform better than older adults.

Checking the conclusions:

I. As per the experiment, there is some correlation between sleep and memory.
True — The experiment directly studies the relation between sleep and memory, and findings show differences.

II. The part of brain involved in memory is more active during the day as compared to that during the night.
Not stated — The experiment only says night-sleep had a higher negative effect, but it never measured brain activity levels.

III. A sleep of more than 8 hours can improve the memory in older adults.
Not stated — Nowhere does it mention "more than 8 hours" or its effect on older adults.

IV. Memorising something immediately after waking up from an 8-hour long sleep will yield better results than memorising before sleep.
Not stated — The opposite was tested: memorising before sleep gave better recall. Nothing was tested about after waking.

Correct conclusion = Only I.

But since option “Only I” is not listed, the right choice is: D. None of these