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AMicrogene+cApproach:Astorybehind
Ma+jaSve+na
S1 S2 S3 ... S7
6y
7y
8y
trainingsessions
development/cross-sec+on/
age
154problemsin7sessions
oversessions(1-7) overage(6-7) match
total%correct increase increase +
%formcorrect nochange nochange +
%orienta+oncorrect increase increase +
%sizecorrect increase increase +
%colourcorrect nochange nochange +
%formcited nochange nochange +
%orienta+oncited nochange increase -
%sizecited nochange nochange +
%colourcited nochange nochange +
predominanterror duplicates duplicates +
stabilityover+me yes predicted +
transfertoconserva+on yes predicted +
training/cross-sec+onalmatch
mgm:principles&rulesDatacollec+on• observa+onspanthe
(whole)periodof(rapid)change
• thedensityoftheobservaitonishigh,rela+vetothespeedofchange
• thechangeisoPen(experimantally)manipulated
Dataanalyses• source• rate• path• breadth• variability
020406080
100
-30 -24 -18 -12 -6 0 6 12 18 24 30
Trials
Stra
tegy
Use
dup err other err correct
0
20
40
60
80
100
1 2 3 4 5 6 7
Session
% C
orre
ct non-learners
learners
precocious
9 70 44 46 134 109 65 51 122 10 51 107 109 109
5 17 3 53 122 34 139 81 141 1 13 98 16 21
59 52 41 57 62 85 66 34 115 85 83 78 84 64
8 11 51 46 12 46 45 91 10 24 35 72 133 146
10 20 71 26 148 21 64 77 69 140 139 131 21 126
1 10 19 30 71 24 77 53 148 14 9 106 76 148
6 3 42 36 9 101 48 53 59 8 96 1 62 89
23 48 102 74 115 71 74 116 98 28 100 74 29 11
12 17 68 65 70 140 140 72 65 23 16 17 28 38
77 41 9 132 67 71 53 125 16 28 10 15 135 72
2 8 9 18 54 26 62 83 93 10 16 34 24 76
9 19 21 36 48 94 85 97 142 9 10 26 42 74
5 11 20 23 36 62 78 93 128 9 18 38 49 70
16 5 69 41 45 73 51 149 66 6 9 10 7 139
2 7 6 6 67 17 116 72 141 9 11 25 28 30
32 46 51 71 70 61 68 85 70 8 81 70 70 74
15 15 26 24 39 71 53 50 21 11 24 40 53 41
2 9 14 17 34 20 69 83 139 4 9 14 87 24
5 5 15 23 27 27 62 80 70 2 15 19 70 75
3 7 12 20 39 42 108 88 133 6 11 26 72 57
5 8 24 12 24 69 66 27 104 9 25 28 73 60
4 15 18 53 41 56 69 88 142 6 7 20 49 62
2 10 15 22 36 69 72 94 107 8 22 31 54 129
7 14 20 60 69 80 130 136 134 12 17 19 41 85
1 3 5 23 4 25 67 55 142 1 5 11 8 45
3 7 12 18 27 85 83 123 141 5 3 11 17 38
7 19 18 21 59 74 81 132 139 11 16 22 19 31
12 24 28 43 67 82 97 121 139 24 22 43 45 38
6 18 35 54 67 82 108 129 141 7 5 10 10 23
13 24 31 53 74 86 119 125 139 8 18 12 27 36
6 13 25 57 68 82 98 111 141 3 8 13 17 8
3 8 15 61 66 83 94 139 146 7 9 20 27 39
5 18 29 43 66 82 104 109 141 8 3 9 7 10
8 5 1 15 66 81 92 133 141 5 14 14 16 22
8 16 19 30 37 48 57 136 138 7 18 32 48 48
Variabilityofchange
0
20
40
60
80
100
1 2 3 4 5 6 7
Session
% C
orre
ct non-learners
learners
precocious
Pathofchange(quan+ta+ve&qualita+veanalysisoferrors)
020406080
100
-30 -24 -18 -12 -6 0 6 12 18 24 30
Trials
Stra
tegy
Use
dup err other err correct
• 154problems• Atsomepoint...
learnersdiscoveredthecorrectsolu+on
• Definedas3consecu+velycorrectanswers
0
20
40
60
80
100
1 2 3 4 5 6 7
Session
% C
orre
ct non-learners
learners
precocious
...0100110100101011111011001111...
MGM:thechangeundressedPaXernrecogni+onObserva+on&analysesOverlappingwaves
Dataanalyses• source• rate• path• breadth• variability
020406080
100
-30 -24 -18 -12 -6 0 6 12 18 24 30
Trials
Stra
tegy
Use
dup err other err correct
0
20
40
60
80
100
1 2 3 4 5 6 7
Session
% C
orre
ct non-learners
learners
precocious
MGstudiesonNes+ma+on
• Es+ma+ngN:doesorienta+onmaXer?byWangXuan• Interrela+onbetweencoun+ng&Nes+ma+onin4-6-year
oldsbyLucijaCernivec• Ncogni+on&spaceabili+esin3-yearoldsbySaraMarn• Numericaland+me-reatedes+ma+onbyMarinaVidovic
