Latitudinal gradients as scientific tools for psychologists

It is an unmistakable fact of life that animals and plants function differently at lower and higher latitudes with distinct temperatures and rainfall. No less unmistakable are the opposite directions of these latitudinal gradients above and below the equator. Therefore, it would be surprising if there were no opposite north–south gradients in human functioning in the northern and southern hemispheres. And indeed, recent publications and projects have started to validate, integrate, and explain such north–south gradients in cognitive ability, creativity, ingroup–outgroup dynamics, aggressiveness, life satisfaction, and individualism versus collectivism. Our brief review of these contemporary trends cumulates into a latitudinal-tools matrix for further integration and sophistication of the latitude-related ecology of habitual mindsets and practices.