Adding is favoured over subtracting in problem solving

selectivity bias-the tendency to orient oneself toward and process information from only one part of our environment to the exclusion of other parts, no matter how obvious those parts may be.

Internals would actively seek out strategies to overcome situations of boredom by increasing task complexity or by overcoming anxiety about competition by practicing harder at the skill tasks needed to make themselves better. It was like they were adjusting the temperature—not too hot and not too cold.