Investigating changes in IQ scores over a decade in Brazil: factors at play.

IF 3.6 2区医学 Q1 PSYCHIATRY

Social Psychiatry and Psychiatric Epidemiology Pub Date : 2025-01-01 Epub Date: 2024-02-19 DOI:10.1007/s00127-024-02623-3

Pedro San Martin Soares, Fernando César Wehrmeister, Ana Maria Menezes, Helen Gonçalves, Bernardo Horta, Janaina Motta, Fernando Hartwig

{"title":"Investigating changes in IQ scores over a decade in Brazil: factors at play.","authors":"Pedro San Martin Soares, Fernando César Wehrmeister, Ana Maria Menezes, Helen Gonçalves, Bernardo Horta, Janaina Motta, Fernando Hartwig","doi":"10.1007/s00127-024-02623-3","DOIUrl":null,"url":null,"abstract":"Purpose: This study aimed to determine whether the factors underlying potential differences between two birth cohorts, born in 1982 and 1993, influence the changes in IQ over time.Methods: Data from two Brazilian birth cohorts were used (1993 and 1982 Pelotas Birth Cohorts). The IQ scores were assessed using the WAIS-III test.Results: Results showed that women born in 1993 had a higher average IQ score than those born in 1982, but no difference was found among men. The increase in IQ scores was only limited to participants from families with an income ranging from 1.1 to 3 times the minimum wage at the time of birth. The mean IQ score of participants born to mothers below the age of 20 remained stable over time, but increase for participants whose mothers were 20 years of age or older at the time of birth.Conclusions: This study emphasizes the importance of considering socio-economic and demographic factors when examining differences in IQ scores over time. Further research is needed to understand the underlying mechanisms of these findings.","PeriodicalId":49510,"journal":{"name":"Social Psychiatry and Psychiatric Epidemiology","volume":" ","pages":"249-256"},"PeriodicalIF":3.6000,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Social Psychiatry and Psychiatric Epidemiology","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1007/s00127-024-02623-3","RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/2/19 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"PSYCHIATRY","Score":null,"Total":0}

引用次数: 0

Abstract

Purpose: This study aimed to determine whether the factors underlying potential differences between two birth cohorts, born in 1982 and 1993, influence the changes in IQ over time.

Methods: Data from two Brazilian birth cohorts were used (1993 and 1982 Pelotas Birth Cohorts). The IQ scores were assessed using the WAIS-III test.

Results: Results showed that women born in 1993 had a higher average IQ score than those born in 1982, but no difference was found among men. The increase in IQ scores was only limited to participants from families with an income ranging from 1.1 to 3 times the minimum wage at the time of birth. The mean IQ score of participants born to mothers below the age of 20 remained stable over time, but increase for participants whose mothers were 20 years of age or older at the time of birth.

Conclusions: This study emphasizes the importance of considering socio-economic and demographic factors when examining differences in IQ scores over time. Further research is needed to understand the underlying mechanisms of these findings.

查看原文本刊更多论文

调查巴西十年间智商分数的变化：起作用的因素。

目的：本研究旨在确定 1982 年和 1993 年出生的两个出生队列之间的潜在差异是否会影响智商随时间的变化：方法：采用巴西两个出生组群（1993 年和 1982 年佩洛塔斯出生组群）的数据。结果：结果显示，1993 年出生的女性智商比 1982 年出生的女性高：结果显示，1993 年出生的女性的平均智商分数高于 1982 年出生的女性，但男性之间没有差异。智商分数的提高仅限于出生时收入为最低工资 1.1 至 3 倍的家庭。母亲年龄在 20 岁以下的参试者的平均智商分数随着时间的推移保持稳定，但母亲在参试者出生时年龄在 20 岁或以上的参试者的平均智商分数则有所提高：本研究强调了在研究智商分数随时间变化的差异时考虑社会经济和人口因素的重要性。要了解这些发现的内在机制，还需要进一步的研究。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Social Psychiatry and Psychiatric Epidemiology 医学-精神病学

CiteScore

8.50

自引率

2.30%

发文量

184

审稿时长

3-6 weeks

期刊介绍： Social Psychiatry and Psychiatric Epidemiology is intended to provide a medium for the prompt publication of scientific contributions concerned with all aspects of the epidemiology of psychiatric disorders - social, biological and genetic. In addition, the journal has a particular focus on the effects of social conditions upon behaviour and the relationship between psychiatric disorders and the social environment. Contributions may be of a clinical nature provided they relate to social issues, or they may deal with specialised investigations in the fields of social psychology, sociology, anthropology, epidemiology, health service research, health economies or public mental health. We will publish papers on cross-cultural and trans-cultural themes. We do not publish case studies or small case series. While we will publish studies of reliability and validity of new instruments of interest to our readership, we will not publish articles reporting on the performance of established instruments in translation. Both original work and review articles may be submitted.