Ground for future studies 1) increased sample size, multiple institutions, multiple age ranges, multiple programming languages, multiple native languages, corr

Ground for future studies 1) increased sample size, multiple institutions, multiple age ranges, multiple programming languages, multiple native languages, correlation with Spearman's g 2) controlling for confounders (see "Table 1" of all medical trials) 3) randomization of instruction 4) better history of pre-exposure (surely someone in a university computer class is taking it out of an interest that developed before enrollment) 5) parental professions, levels of education, and annual earnings 6) latency effects -- did people "come around" later, how long do the effects last? 7) frequency effects -- does a burst of lots of programming exposure kick someone over a knee in the curve (as is done in language schools) 8) amplitude effects -- does intense instruction yield intense results? Overall I liked it.