a follow-up study
... that a follow-up study by Stanford psychologist Walter Mischel showed that a child's ability at age 4 to delay eating a marshmallow for 15 minutes correlated with higher SAT test scores years later?
... that <b id="mwBw4"><a href="./Stanford_marshmallow_experiment" id="mwBw8" rel="mw:WikiLink" title="Stanford marshmallow experiment">a follow-up study</a></b> by <a href="./Stanford_University" id="mwBxA" rel="mw:WikiLink" title="Stanford University">Stanford</a> psychologist <a href="./Walter_Mischel" id="mwBxE" rel="mw:WikiLink" title="Walter Mischel">Walter Mischel</a> showed that a child's ability at age 4 to delay eating a <a href="./Marshmallow" id="mwBxI" rel="mw:WikiLink" title="Marshmallow">marshmallow</a> for 15 minutes correlated with higher <a href="./SAT" id="mwBxM" rel="mw:WikiLink" title="SAT">SAT</a> test scores years later?