A Vancouver physiotherapist has developed a simple way to identify infants who have undiagnosed mental retardation or movement disorders. The 22-step behavioral test uses cues from a baby’s movement, ...

Since average scores on particular IQ tests rise a few points every 3 or 4 years, those tests become obsolete after a couple of decades. In order to reset the average score to 100, harder IQ tests are ...

Despite decades of research, mental retardation remains an amorphous concept defined not in black and white but in ever-changing shades of gray. As recently as 40 years ago, the condition was defined ...

Despite decades of research, mental retardation is an amorphous concept defined not in black and white, but in ever-changing shades of gray. As recently as 40 years ago, the condition was defined ...

The steady rising of IQ scores over the last century – known as the Flynn effect – causes IQ tests norms to become obsolete over time. To counter this effect, IQ tests are "renormed" (made ...