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Changes for page Studies: IQ

Last modified by Ryan C on 2025/06/25 20:56
From version 12.1
edited by Ryan C
on 2025/06/21 06:30
Change comment: Uploaded new attachment "rushton2005 OCR.pdf", version {1}
To version 13.1
edited by Ryan C
on 2025/06/21 06:30
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144 144  
145 145  {{expandable summary="📊 Key Statistics"}}
146 146  1. **General Observations:**
147 - - Mean IQ gap between Blacks and Whites in the U.S.: **~15 points**.
147 + - Mean IQ gap between Blacks and Whites in the U.S.: **15 points**.
148 148   - Heritability estimates for IQ: **0.5 to 0.8** (moderate to high).
149 - - Brain volume differences align with IQ differences: **~50 cm³ difference** on average.
149 + - Brain volume differences align with IQ differences: **50 cm³ difference** on average.
150 150  
151 151  2. **Subgroup Analysis:**
152 152   - **Black Americans** consistently score about 1 SD below **White Americans** across age groups.
... ... @@ -200,12 +200,14 @@
200 200  {{/expandable}}
201 201  
202 202  {{expandable summary="📄 Download Full Study"}}
203 -[[Download Full Study>>attach:THIS IS SAVED DIRECTLY.pdf]]
203 +[[Download Full Study>>attach:rushton2005 OCR.pdf]]
204 204  {{/expandable}}
205 205  {{/expandable}}
206 206  
207 +{{expandable summary="
207 207  
208 -{{expandable summary="Study: Brain Size, IQ, and Racial-Group Differences"}}
209 +
210 +Study: Brain Size, IQ, and Racial-Group Differences"}}
209 209  **Source:** *Intelligence (Elsevier)*
210 210  **Date of Publication:** *2003*
211 211  **Author(s):** *J. Philippe Rushton, Elizabeth W. Rushton*
... ... @@ -215,14 +215,14 @@
215 215  
216 216  {{expandable summary="📊 Key Statistics"}}
217 217  1. **Average Brain Volumes (cc):**
218 - - Blacks: ~1267 cm³
219 - - Whites: ~1347 cm³
220 - - East Asians: ~1364 cm³
220 + - Blacks: 1267 cm³
221 + - Whites: 1347 cm³
222 + - East Asians: 1364 cm³ 
221 221  
222 222  2. **IQ Averages:**
223 - - Blacks: ~85
225 + - Blacks: 85
224 224   - Whites: 100
225 - - East Asians: ~106
227 + - East Asians: 106 
226 226  
227 227  3. **Correlation Between Brain Size & Morphological Traits:**
228 228   - Across 37 skeletal variables, mean correlation with brain size: **r = 0.94**
... ... @@ -272,5 +272,3 @@
272 272  [[Download Full Study>>attach:rushton2003.pdf]]
273 273  {{/expandable}}
274 274  {{/expandable}}
275 -
276 -