0 Votes
Last modified by Ryan C on 2025/06/25 18:57

From version 5.1
edited by Ryan C
on 2025/06/21 05:30
Change comment: Attachment moved from xwiki:Main Categories.Science & Research.Research at a Glance.WebHome.
To version 6.1
edited by Ryan C
on 2025/06/21 06:33
Change comment: There is no comment for this version

Summary

Details

Page properties
Content
... ... @@ -201,71 +201,4 @@
201 201  {{/expandable}}
202 202  {{/expandable}}
203 203  
204 -{{expandable summary="
205 205  
206 -Study: Is there a Dysgenic Secular Trend Towards Slowing Simple Reaction Time?"}}
207 -**Source:** *Intelligence (Elsevier)*
208 -**Date of Publication:** *2014*
209 -**Author(s):** *Michael A. Woodley, Jan te Nijenhuis, Raegan Murphy*
210 -**Title:** *"Is there a Dysgenic Secular Trend Towards Slowing Simple Reaction Time?"*
211 -**DOI:** [10.1016/j.intell.2014.05.012](https://doi.org/10.1016/j.intell.2014.05.012)
212 -**Subject Matter:** *Cognitive Decline, Intelligence, Dysgenics*
213 -
214 -{{expandable summary="📊 Key Statistics"}}
215 -1. **General Observations:**
216 - - The study examines reaction time data from **13 age-matched studies** spanning **1884–2004**.
217 - - Results suggest an estimated **decline of 13.35 IQ points** over this period.
218 -
219 -2. **Subgroup Analysis:**
220 - - The study found **slower reaction times in modern populations** compared to Victorian-era individuals.
221 - - Data from **Western countries (US, UK, Canada, Australia, Finland)** were analyzed.
222 -
223 -3. **Other Significant Data Points:**
224 - - The estimated **dysgenic rate is 1.21 IQ points lost per decade**.
225 - - Meta-regression analysis confirmed a **steady secular trend in slowing reaction time**.
226 -{{/expandable}}
227 -
228 -{{expandable summary="🔬 Findings"}}
229 -1. **Primary Observations:**
230 - - Supports the hypothesis of **intelligence decline due to genetic and environmental factors**.
231 - - Reaction time, a **biomarker for cognitive ability**, has slowed significantly over time.
232 -
233 -2. **Subgroup Trends:**
234 - - A stronger **correlation between slower reaction time and lower general intelligence (g)**.
235 - - Flynn effect (IQ gains) does not contradict this finding, as reaction time is a **biological, not environmental, measure**.
236 -
237 -3. **Specific Case Analysis:**
238 - - Cross-national comparisons indicate a **global trend in slower reaction times**.
239 - - Factors like **modern neurotoxin exposure** and **reduced selective pressure for intelligence** may contribute.
240 -{{/expandable}}
241 -
242 -{{expandable summary="📝 Critique & Observations"}}
243 -1. **Strengths of the Study:**
244 - - **Comprehensive meta-analysis** covering over a century of reaction time data.
245 - - **Robust statistical corrections** for measurement variance between historical and modern studies.
246 -
247 -2. **Limitations of the Study:**
248 - - Some historical data sources **lack methodological consistency**.
249 - - **Reaction time measurements vary by study**, requiring adjustments for equipment differences.
250 -
251 -3. **Suggestions for Improvement:**
252 - - Future studies should **replicate results with more modern datasets**.
253 - - Investigate **alternative cognitive biomarkers** for intelligence over time.
254 -{{/expandable}}
255 -
256 -{{expandable summary="📌 Relevance to Subproject"}}
257 -- Provides evidence for **long-term intelligence trends**, contributing to research on **cognitive evolution**.
258 -- Aligns with broader discussions on **dysgenics, neurophysiology, and cognitive load**.
259 -- Supports the argument that **modern societies may be experiencing intelligence decline**.
260 -{{/expandable}}
261 -
262 -{{expandable summary="🔍 Suggestions for Further Exploration"}}
263 -1. Investigate **genetic markers associated with reaction time** and intelligence decline.
264 -2. Examine **regional variations in reaction time trends**.
265 -3. Explore **cognitive resilience factors that counteract the decline**.
266 -{{/expandable}}
267 -
268 -{{expandable summary="📄 Download Full Study"}}
269 -[[Download Full Study>>attach:10.1016_j.intell.2014.05.012.pdf]]
270 -{{/expandable}}
271 -{{/expandable}}