In a research study investigating the heritability of intelligence, a psychologist collects IQ scores from a sample of parents and their biological children. The psychologist wants to determine if there is a significant relationship between the parents' IQ scores and their children's IQ scores. Which statistical test would be most appropriate for analyzing the relationship in this scenario? a. Independent samples t-test b. Pearson correlation coefficient c. Chi-square test of independence d. Paired samples t-test