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188 <strong>Beeldschermkinderen</strong><br />

23 Valkenburg & Cantor, 2001; Rideout,<br />

Vandewater, & Wartella, 2003.<br />

24 Young, 1990.<br />

25 Anderson & Pempek, 2005; Valkenburg<br />

& Vroone, 2004.<br />

26 Acuff, 1997.<br />

27 Valkenburg & Hellendoorn, 1992.<br />

28 Wellman, 1990.<br />

29 Astington (1993).<br />

30 Parker, 1995.<br />

31 Davies, 1997.<br />

32 Carvey & Berndt (1977); in Astington<br />

(1993).<br />

33 Jaglom & Gardner, 1981.<br />

34 Harris, 2000.<br />

35 Bruner, 1966.<br />

36 Piaget, 1954.<br />

37 Howard, 1998.<br />

38 Anderson et al., 1986; Ruff & Lawson,<br />

1990.<br />

39 Rice et al., 1990.<br />

40 McGhee, 1979.<br />

41 Cohen, 1972; Siegler, 1998.<br />

42 Seiter, 1998.<br />

43 Davies et al., 2000; Seiter, 1998.<br />

44 Seiter, 1998.<br />

45 Acuff, 1997.<br />

46 Gunter et al., 1991.<br />

47 Mielke, 1983.<br />

48 Sheldon, 1998.<br />

49 Flavell et al., 1993.<br />

50 Flavell et al., 1993.<br />

51 Gunter et al., 1991.<br />

52 Flavell et al., 1993.<br />

53 Selman, 1980.<br />

54 Fernie, 1981; Hoffner & Cantor, 1991.<br />

55 Davies et al., 2000; Kellner, 1998.<br />

56 Hoffner & Cantor, 1991.<br />

57 Constanzo & Shaw, 1966.<br />

58 Mielke, 1983; Davies et al., 2000.<br />

59 Valkenburg & Cantor, 2001.<br />

60 Buijzen & Valkenburg, 2000b; Valken-<br />

burg & Soeters, 2001.<br />

61 Fagot, 1994; Goldstein, 1998.<br />

62 Leaper, 1994; Maccoby, 1988, 1990.<br />

63 O’Brien & Huston, 1985.<br />

64 Martin, 1994.<br />

65 Goldstein, 1998; James & McCain, 1982.<br />

66 Acuff, 1997.<br />

67 Hoffner & Cantor, 1991.<br />

68 Oliver & Green, 2001.<br />

69 Ullian, 1977.<br />

70 Livingstone & Bovill, 1999; Rosengren<br />

& Windahl, 1989.<br />

71 Valkenburg & Janssen, 1999.<br />

72 Hartman & Klimmt, 2006.<br />

73 Acuff, 1997; Heeter, 1988; Sanger et al.,<br />

1997; Valkenburg & Janssen, 1999.<br />

Hoofdstuk 3<br />

1 Wood et al., 1991.<br />

2 Bushman & Huesmann, 2006; Ander-<br />

son & Bushman, 2001; Paik & Com-<br />

stock, 1994; Sherry, 2001; Wood et al.,<br />

1991.<br />

3 Cohen, 1988.<br />

4 De mediaan is de middenscore van een<br />

variabele, het punt waarbij precies 50%<br />

van de scores lager of hoger ligt. Degenen<br />

die meer over deze eenvoudige en<br />

praktische omrekeningsmethode willen<br />

weten, verwijs ik naar Rosenthal en<br />

Rubin (1982).<br />

5 Bushman & Huesmann, 2001; McCart-

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