Looking at Groups of IQs:

I acknowledge that the sample set for the highest IQ groups are, of course, rather small, but that's all we've got. What's been happening with the numbers for the highest IQ groups, if indicative of what's really happening, is not encouraging. The highest two groups have decreased in numbers while the lowest two have increased. Also, it looks like the prominence of each group has shifted over time such that the highest group went from being 1/5 to 1/20 and the moderately gifted and normal groups have grown substantially.

Exceptionally Gifted Respondents (Self-Reported IQ)

(Defined as having an IQ of 160 or more)

2009: 11 (7%)

2011: 27 (3%)

2012: 22 (2%) (Decreased)

Highly Gifted Respondents (Self-Reported IQ)

(Defined as having an IQ between 145-159)

2009: 17 (11%)

2011: 88 (9%)

2012: 81 (7%) (Decreased)

Moderately Gifted Respondents (Self-Reported IQ)

(Defined as having an IQ between 132-144)

2009: 22 (14%)

2011: 125 (13%)

2012: 149 (11%) (Increased)

Normal Respondents (Self-Reported IQ)

(Defined as having an IQ between 100-131)

2009: 11 (7%)

2011: 91 (10%)

2012: 94 (9%) (Increased)

Each Group as a Percentage of Total IQ Respondents, by Year:

2009 Group IQ Distribution (As a percentage of 61 total IQ respondents)

18% Exceptionally Gifted

28% Highly Gifted

36% Moderately Gifted

18% Normal IQ

2011 Group IQ Distribution (As a percentage of 331 total IQ respondents)

8% Exceptionally Gifted

27% Highly Gifted

38% Moderately Gifted

28% Normal IQ

2012 Group IQ Distribution (As a percentage of 346 total IQ respondents)

6% Exceptionally Gifted

23% Highly Gifted

43% Moderately Gifted

27% Normal IQ