Bibliography (12):

1. Revisiting the Marshmallow Test: A Conceptual Replication Investigating Links Between Early Delay of Gratification and Later Outcomes

2. Personality Psychology

3. A Mega-Analysis of Personality Prediction: Robustness and Boundary Conditions

4. Heritability × SES Interaction for IQ: Is it Present in US Adoption Studies?

5. Cognitive ability and Conscientiousness are more important than SES for educational attainment: An analysis of the UK Millennium Cohort Study

6. Genetic and environmental architecture of Conscientiousness in adolescence

7. Personality, IQ, and lifetime earnings

8. Wikipedia Bibliography:

   1. https://en.wikipedia.org/wiki/Delayed_gratification  :

      https://en.wikipedia.org/wiki/Delayed_gratification

   2. Observational error

   3. Marshmallow test  :

      https://en.wikipedia.org/wiki/Stanford_marshmallow_experiment

   4. Preregistration (science) § Registered reports  :

      https://en.wikipedia.org/wiki/Preregistration_(science)#Registered_reports

   5. Statistical power