“…On the other hand Tansey's opinion that "teaching practice is largely haphazard and unstructured, and is not an adequate preparation..." (1969) suggests that introverts in the microclass group would not become better than the control group. The latter, which showed no difference between introverts and extraverts initially might be expected (as junior secondary teachers) to move towards the pattern found by the majority of investigators (except those who consider secondary mathematics and physical science teachers), namely, that the more introverted teachers are less successful, as are those who are emotionally unstable (Birkinshaw, 1935;Evans & Wrenn, 1942;Lamke, 1951;Singh, 1968). Results are shown in Table VI.…”