A researcher plans to study the long-term effect of Covid-19 on human cognitive functions. The plan is summarized below.
STUDY-I (Study conducted in 2022)
Group A: 10 years old males and females
Group B: 20 years old males and females
Group C: 30 years old males and females
STUDY-II (Study to be conducted in 2025)
Group D: 13 years old males and females
Group E: 23 years old males and females
Group F: 33 years old males and females
This research design is known as?
As per the ethical guidelines of American Psychological Association, which of the option(s) depict(s) unacceptable use of ‘Deception’ in psychology research?
Eight students (P, Q, R, S, T, U, V, and W) are playing musical chairs. The figure indicates their order of position at the start of the game. They play the game by moving forward in a circle in the clockwise direction.
After the 1st round, the 4th student behind P leaves the game.
After the 2nd round, the 5th student behind Q leaves the game.
After the 3rd round, the 3rd student behind V leaves the game.
After the 4th round, the 4th student behind U leaves the game.
Who all are left in the game after the 4th round?

The 12 musical notes are given as \( C, C^\#, D, D^\#, E, F, F^\#, G, G^\#, A, A^\#, B \). Frequency of each note is \( \sqrt[12]{2} \) times the frequency of the previous note. If the frequency of the note C is 130.8 Hz, then the ratio of frequencies of notes F# and C is:
Here are two analogous groups, Group-I and Group-II, that list words in their decreasing order of intensity. Identify the missing word in Group-II.
Abuse \( \rightarrow \) Insult \( \rightarrow \) Ridicule
__________ \( \rightarrow \) Praise \( \rightarrow \) Appreciate