# Flynn has shown that there has been a standard deviation increase, per generation, in the mean level of intelligence test performance for most of this country in Western society, which equates to about three IQ points per decade. He believes that such a difference has to be result of which one of the following? with Answer - Psychology Mcqs | ExamZone

> Solved MCQ: Flynn has shown that there has been a standard deviation increase, per generation, in the mean level of intelligence test performance for most of this country in Western society, which equates to about three IQ points per decade. He believes that such a difference has to be result of which one of the following? Correct Answer: A. An environmental change, because gene frequencies in populations couldn’t change so quickly.. Verified answer explanation for FPSC, PPSC, MDCAT, NTS, and CSS competitive exam preparation.

---

Tested in Competitive Exams:

- [NTS Test Prep](https://test-prep.blog/exams/nts)
- [FPSC Past Papers](https://test-prep.blog/exams/fpsc)
- [PPSC Solved MCQs](https://test-prep.blog/exams/ppsc)
- [PMDC MDCAT 2026](https://test-prep.blog/exams/mdcat)
- [UET ECAT Prep](https://test-prep.blog/exams/ecat)
- [CSS Central Superior](https://test-prep.blog/exams/css)

- [Psychology Mcqs](https://test-prep.blog/categories/psychology-mcqs)
Difficulty: Challenging 61% Accuracy

# Flynn has shown that there has been a standard deviation increase, per generation, in the mean level of intelligence test performance for most of this country in Western society, which equates to about three IQ points per decade. He believes that such a difference has to be result of which one of the following?

Direct Answer & Quick Reference

The correct option is **A. An environmental change, because gene frequencies in populations couldn’t change so quickly.**.

A. An environmental change, because gene frequencies in populations couldn’t change so quickly. **(Correct Answer)**

B. Improvements in the gene pool as we evolve.

C. A statistical artefact.

D. None of the above.

Verified Key: A. An environmental change, because gene frequencies in populations couldn’t change so quickly.
Solved by 1,456+ students

Verified against official examination board answer keys and standard curriculum textbooks.

- [Previous Question Sigmund Freud is regarded as the father of __________ in psychology.](https://test-prep.blog/mcq/sigmund-freud-is-regarded-as-the-father-of-__________-in-psychology-162f6925-b1bc-4874-812a-aa0cfd0b037e)
- [Next Question What is meaning of “Autophobia”?](https://test-prep.blog/mcq/what-is-meaning-of-autophobia-f38d957c-7f13-4492-8425-2e8ac2fc92d8)

- [Practice More Psychology Mcqs MCQs](https://test-prep.blog/quiz/smart?category=psychology-mcqs)
- [How We Verify Questions →](https://test-prep.blog/editorial-policy)

## Subject Overview

Explore thousands of solved past paper MCQs for Psychology Mcqs categorized with explanations.

- [Browse All Psychology Mcqs MCQs →](https://test-prep.blog/categories/psychology-mcqs)

## Related Questions

- [Sigmund Freud is regarded as the father of __________ in psychology.](https://test-prep.blog/mcq/sigmund-freud-is-regarded-as-the-father-of-__________-in-psychology-162f6925-b1bc-4874-812a-aa0cfd0b037e)
- [What is meaning of “Autophobia”?](https://test-prep.blog/mcq/what-is-meaning-of-autophobia-f38d957c-7f13-4492-8425-2e8ac2fc92d8)
- [The part of the neuron that specializes in receiving massages from other neurons is the:](https://test-prep.blog/mcq/the-part-of-the-neuron-that-specializes-in-receiving-massages-from-other-neurons-096a3b1e-8858-4d5c-a844-eb10948dd4c8)
- [An extremely complex behaviour that includes biological rhythms, territorial behaviour, courtship, mating, aggression, altruism and social organizations is:](https://test-prep.blog/mcq/an-extremely-complex-behaviour-that-includes-biological-rhythms-territorial-beha-7f7558fd-ea73-48c1-917f-24b5025514f7)
- [The behaviour that depends on the experiences in one’s own life but for this to occur depends upon the development and evolution of the nervous system of that animal is:](https://test-prep.blog/mcq/the-behaviour-that-depends-on-the-experiences-in-ones-own-life-but-for-this-to-o-71ae8c8a-66ff-460c-80dc-2640ff83d617)

---
*Source: https://test-prep.blog/mcq/flynn-has-shown-that-there-has-been-a-standard-deviation-increase-per-generation-895878b5-c0d2-4cb5-922e-f27788501904*
*Format: Markdown for Agents (Content Negotiation: text/markdown)*