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From Gessel's research "modern developmental parenting styles" were "freeing parents from the anxiety caused by rigid, age based theories of development" (2016).

Arnold Gesell's Contribution to Modern Developmental Parenting Styles: The Freedom To Be You. (2016, January 28). Retrieved March 21, 2018, from http://motherhoodinpointoffact.com/developmental-parenting-styles-the-freedom-to-be-you/

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Gesell feels "that cultural environments, social environments, and other factors also play a role in maturation" (2017)  He also discovered that that infants gain control of their body with a fixed sequence.

Arnold Gesell Maturation Theory Explained. (2017, September 27). Retrieved March 21, 2018, from https://healthresearchfunding.org/arnold-gesell-maturation-theory-explained/

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""Observed and documented patterns in the way children develop, showing that all children go through similar and predictable sequences". The time it takes for children to go through these sequences vary on the child.

Gesell Theory. Retrieved March 21, 2018, from https://gesellinstitute.org/pages/gesell-theory

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Gesell believed that certain characteristics of children would come about with age. This was because the biological and maturational blueprint.

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Much of his provocative views were derived from Charles Darwin.

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This dome allowed Gessell to photograph children during their activities. The dome also allowed for other to observe from outside.