project 1:

The effect of Memory load on Processing performance:

The continuation

idea

TBRS research 2001-2011:

• study central interference through effect of processing on storage

• increase cognitive load, observe effect on memory performance

direct, linear relationship

idea

Idea now:

• study central interference through effect of storage on processing

• increase memory load, observe effect on processing performance

What kind of relationship???

Experiment 1: silent verbal= verbal version; storage = letters (0 to 7); processing = silent parity judgment

12 sec parity judgment recall

D 12 sec parity judgment recall

D 12 sec parity judgment recallP

D 12 sec parity judgment recallP H

D 12 sec parity judgment recallP H S

D 12 sec parity judgment recallP H S L

D 12 sec parity judgment recallP H S L B

D 12 sec parity judgment recallP H S L B F

Experiment 2: spatial= spatial version; storage = locations (0 to 5); processing = spatial fit judgment

12 sec fit judgment recall

12 sec fit judgment recall

12 sec fit judgment recall

12 sec fit judgment recall

12 sec fit judgment recall

12 sec fit judgment recall

Experiment 3: babibou verbal= verbal version; storage = letters (0 to 7); processing = babibou parity judgment

12 sec parity judgment + babibou recall

D 12 sec parity judgment + babibou recall

D 12 sec parity judgment + babibou recallP

D 12 sec parity judgment + babibou recallP H

D 12 sec parity judgment + babibou recallP H S

D 12 sec parity judgment + babibou recallP H S L

D 12 sec parity judgment + babibou recallP H S L B

D 12 sec parity judgment + babibou recallP H S L B F

Compare exp 1, 2 and 3RT correct judgments

0 1 2 3 4 5 6 7500

600

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XP 1 VERBAL (LETTERS + PARITY)XP 2 SPATIAL (LOCATIONS + FIT)XP 3 BIS VERBAL (LETTERS + "PARITY + BABIBOU")

MEMORY LOAD

RT C

ORR

ECT

JUDG

MEN

T

Experiment 3bis: babibou verbal= verbal version; storage = letters (0 to 7); processing = babibou parity judgment

12 sec parity judgment + babibou recall

D 12 sec parity judgment + babibou recall

D 12 sec parity judgment + babibou recallP

D 12 sec parity judgment + babibou recallP H

D 12 sec parity judgment + babibou recallP H S

D 12 sec parity judgment + babibou recallP H S L

D 12 sec parity judgment + babibou recallP H S L B

D 12 sec parity judgment + babibou recallP H S L B F

Experiment 4: verbal mono-/bi-syllabic words= verbal version; storage = letters (0 to 7); processing = parity judgment

12 sec parity judgment recall

M 12 sec parity judgment recallM M M M M M

P.EX.

- PEUR CUIR SANG CIEL CAMP

- GARCON RAISON TRAVAIL MATIN REPAS

exp 4RT correct judgments

ONLY NATIVE FRENCH

SPEAKERS!

Compare exp 1, 3 AND 4RT correct judgments

Experiment 5: spatial= spatial version; storage = locations (0 to 5); processing = PARITY fit judgment

12 sec parity judgment recall

12 sec parity judgment recall

12 sec parity judgment recall

12 sec parity judgment recall

12 sec parity judgment recall

12 sec parity judgment recall

exp 5RT correct judgments

0 1 2 3 4 5500

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1200

EXP 2 LOC + FITEXP 5 LOC + PARITY

ALL

0 1 2 3 4 5 6 7600

700

800

900

1000

1100

1200

EXP 1 LETTER + PARITYEXP 2 LOC + FITEXP 3 LETTER + PARITY + BABIBOUEXP 4 MONOSYLL + PARITYEXP 4 MONOSYLL + PARITYEXP 5 LOC + PARITY

project 2:

Using the effect of Memory load on Processing performance to examine:

Cost of maintaining cross-domain items

CONDITION 1: verbal= verbal version; storage = letters (0 to 5); processing = parity judgment + BABIBOU

12 sec parity judgment + BABIBOU recall

D 12 sec parity judgment+ BABIBOU recall

D 12 sec parity judgment + BABIBOU recallP

D 12 sec parity judgment + BABIBOU recallP H

D 12 sec parity judgment + BABIBOU recallP H S

D 12 sec parity judgment + BABIBOU recallP H S L

CONDITION 2: spatial= spatial version; storage = locations (0 to 5); processing = parity judgment + BABIBOU

12 sec parity judgment + BABIBOU recall

12 sec parity judgment+ BABIBOU recall

12 sec parity judgment+ BABIBOU recall

12 sec parity judgment + BABIBOU recall

12 sec parity judgment + BABIBOU recall

12 sec parity judgment + BABIBOU recall

CONDITION 3: cross-domain= spatial version; storage = letters in locations (0 to 5); processing = parity judgment +

BABIBOU

12 sec parity judgment + BABIBOU recall

12 sec parity judgment + BABIBOU recall

12 sec parity judgment + BABIBOU recall

12 sec parity judgment + BABIBOU recall

12 sec parity judgment + BABIBOU recall

12 sec parity judgment + BABIBOU recall

R

RESULTSMEMACC

0 1 2 3 4 50

0.2

0.4

0.6

0.8

1

1.2

CROSSSPATVERB

RESULTSPROCACC

0 1 2 3 4 50.5

0.55

0.6

0.65

0.7

0.75

0.8

0.85

0.9

0.95

1

CROSSSPATVERB

RESULTSRT ALL

0 1 2 3 4 5600

650

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950

1000

1050

CROSSSPATVERB

SLOPE = 33 MS

SLOPE = 41 MS

SLOPE = 71 MS

RESULTSRT CONS

0 1 2 3 4500

1000

1500

2000

2500

CROSS SPAT

VERB

RESULTSRT MAINT

0 1 2 3 4600

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CROSS SPAT

VERB

SLOPE = 37 MS

SLOPE = 17 MS

SLOPE = 14 MS

DISCon central level of WM:• Not just « an object »• verbal ≈ spatial• cross ≈ verbal + spatial but all RT vs maint RT?

? Force participants to start processing immediately after presentation of memory items?

+ test with other material (e.g. objects in locations)