People frequently see design in nature that reflects intuitive teleological thinking– that is, the order in nature that supports life suggests it was designed for that purpose. This research proposes that inferences are stronger when nature supports human life in particular. Five studies (total N = 1788) examine evidence for an anthro-teleological bias. People agreed more with design statements framed to aid humans (e.g., “trees produce oxygen so that humans can breathe”) than the same statements framed to aid other targets (...) (“trees produce oxygen so that leopards can breathe”). The bias was greatest when advantages for humans were well-known and salient (e.g., the ozone layer) and decreased when advantages for other targets were made explicit. The bias was not eliminated by highlighting the benefits for other species, however, and emerged spontaneously for novel phenomena (Jupiter’s gravity protects Earth from asteroids). We conclude that anthropocentric biases enhance existing teleological biases to see stronger design in phenomena where it enables human survival. (shrink)

The authors found that the feeling of authorship for mental actions such as solving problems is enhanced by effort cues experienced during mental activity; misattribution of effort cues resulted in inadvertent plagiarism. Pairs of participants took turns solving anagrams as they exerted effort on an unrelated task. People inadvertently plagiarized their partners’ answers more often when they experienced high incidental effort while working on the problem and reduced effort as the solution appeared. This result was found for efforts produced when (...) participants squeezed a handgrip during the task (Experiment 1) or when the anagram was displayed in a font that was difficult to read (Experiments 2, 3a, and 3b). Plagiarism declined, however, when participants attended to the source of the effort cues (Experiments 3a and 3b). These results suggest that effort misattribution can influence authorship processing for mental activities. (shrink)