The minimum IQ score, based on the provided classification, is below 70.
Understanding IQ Classifications
The concept of IQ, or Intelligence Quotient, is often used to quantify a person's cognitive abilities compared to the general population. IQ tests are designed to produce an average score of 100, with standard deviations above and below this average. According to historical IQ classifications, scores are grouped into ranges each with a specific label.
IQ Classifications and Interpretations
| IQ Range ("ratio IQ") | IQ Classification |
|---|---|
| 90–109 | Normal or average |
| 80–89 | Low average |
| 70–79 | Borderline defective |
| Below 70 | Mentally defective |
As seen in the table, an IQ score below 70 is classified as "Mentally defective", representing the lowest range in this particular classification. It is important to note that IQ classifications and terminology may vary across different sources and time periods, but in this context the lowest score is below 70.
