Complex sentence: Research on the "What is beautiful is good" stereotype shows that, overall, those who are physically attractive are perceived more positively and that physical attractiveness has a strong influence on judgements of a persons competence.
Split into simpler sentences: Research on the "What is beautiful is good" stereotype shows that, overall, those who are physically attractive benefit from their good looks. Researchers found that physically attractive individuals are perceived more positively and that physical attractiveness has a strong influence on judgements of a persons competence.