Gene Expression: Flynn Effect my a$$

New ACT data out. Surprise, surprise regarding rank order, etc.

What is interesting is the stability of the mean score.

If you look at a little longer time period, the stability of mean scores is uncanny¹:

**National Average ACT Composite Score, 1994–2004**
1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004
20.8	20.8	20.9	21.0	21.0	21.0	21.0	21.0	20.8	20.8	20.9

Now, we know the SAT is highly g-loaded, and the ACT cannot be too far behind (see how high they correlate). So, combine this with J. P. Rushton's work, and I pose to you that the Flynn Effect is just psychometric slight-of-hand, i.e., while IQ scores appear to the naked eye to be going up, mean "intelligence" is rather steady.

1. The rescaling was in the early 1990s, and I do not believe that any of the scores were computed under the old scaling.