Table 4.

Between-group Differences at T1 and T2: Kruskal-Wallis-Test.

Instrument		Ch2
		at T1	at T2
TMT-B: cognitive flexibility		χ²(2) = .09, p = .956a	χ²(2) = 3.17, p = .205e
FWIT: ability to inhibit cognitive interference		χ²(2) = .46, p = .796b	χ²(2) = .22, p = .894f
ZVT: cognitive performance / mental speed		χ²(2) = .51, p = .774c	χ²(2) = .01, p = .994e
RWT: divergent reasoning	formal-lexically	χ²(2) = 2.45, p = .294d	χ²(2) = .46, p = .793g
	forma-lexically with shifting	χ²(2) = 1.93, p = .382a	χ²(2) = .12, p = .940h
	semantic	χ²(2) = 3.13, p = .209a	χ²(2) = 1.36, p = .506f
	semantic with shifting	χ²(2) = .65, p = .721a	χ²(2) = .97, p = .614f
TL-D: problem solving, convergent reasoning, planning		χ²(2) = 1.58, p = .453c	χ²(2) = .19, p = .906h

TMT, Trail Making Test Part B [TMT-B; (114)]; FWIT, Farb-Wort-Interferenztest [”Stroop“-Test, FWIT; (115)]; ZVT, Zahlen-Verbindungs-Test [ZVT; (118)]; RWT, Regensburger Wortflüssigkeits-Test [RWT; (117)]; TL-D, Tower of London [TL-D; (116)].

^an = 106.

^bn = 108.

^cn = 104.

^dn = 107.

^en = 97.

^fn = 98.

^gn = 99.

^hn = 100.