Final answer:
The provided reference material does not give information about the perspective of Nalick et al. on corporate SPI, instead it discusses the work of Kenneth and Mamie Clark who determined segregation to be harmful through sociological research. Their findings were influential in challenging segregation in schools.
Step-by-step explanation:
The question seems to be based on a misinterpretation of the provided reference material, which does not pertain to the topic of corporate Social Performance Index (SPI). Instead, it refers to the work of Kenneth and Mamie Clark on sociological research related to segregation. According to their work, segregation was found to be harmful, not beneficial. This landmark research showcased the negative impacts of segregation on African-American children's self-perception and was pivotal in the Brown v. Board of Education Supreme Court case, which aimed to desegregate schools. While the question about corporate SPI does not relate to the Clarks' research, the study of sociology remains vital for understanding such societal issues, shaping public policy, and uncovering inequities like those highlighted by the Clarks.