Disentangling the Effects of Processing Speed on the Association between Age Differences and Fluid Intelligence
Abstract
:1. Introduction
1.1. The Role of Processing Speed in Cognitive Aging
1.2. A Neurocognitive Psychometrics Account of Mental Speed
1.2.1. Diffusion Modeling
1.2.2. Chronometric Analyses of the ERP
1.3. The Present Study
2. Materials and Methods
2.1. Participants
2.2. Procedure
2.3. Measures
2.3.1. Experimental Tasks
2.3.2. Intelligence Test
2.3.3. EEG Recording
2.4. Data Analysis
2.4.1. Reaction Time Data
2.4.2. Electrophysiological Data
2.4.3. Statistical Analyses
3. Results
3.1. Associations between aGe Differences, Fluid Intelligence, and Reaction Times
3.2. Which Process-Related Parameter Accounts for the Association between Age Differences and Fluid Intelligence?
3.3. Do Age Differences Account for the Association between Process-Related Parameters and Fluid Intelligence?
4. Discussion
4.1. Insights from a Neurocognitive Psychometrics Account of Mental Speed
4.2. The Association between Processing Speed and Fluid Intelligence Cannot Be Accounted for by Age Differences
4.3. Limitations
5. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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ACC | RT | v | a | t0 | P2 Latency | N2 latency | P3 Latency | |
---|---|---|---|---|---|---|---|---|
Sternberg task | ||||||||
S3 | 0.98 (0.02) | 799.30 (203.15) | 2.93 (0.91) | 1.85 (0.74) | 0.46 (0.12) | 237.41 (40.13) | 253.49 (50.21) | 362.62 (91.23) |
S5 | 0.97 (0.03) | 961.99 (279.98) | 2.44 (0.98) | 2.00 (0.89) | 0.53 (0.16) | 237.54 (35.41) | 253.02 (50.27) | 387.50 (94.89) |
Posner task | ||||||||
PI | 0.99 (0.02) | 629.79 (100.31) | 4.25 (1.50) | 1.59 (0.77) | 0.43 (0.08) | 220.63 (37.97) | 246.80 (42.80) | 411.03 (94.46) |
NI | 0.98 (0.02) | 707.39 (113.15) | 3.26 (1.07) | 1.52 (0.47) | 0.46 (0.07) | 225.03 (30.51) | 244.78 (36.63) | 418.36 (88.49) |
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Schubert, A.-L.; Hagemann, D.; Löffler, C.; Frischkorn, G.T. Disentangling the Effects of Processing Speed on the Association between Age Differences and Fluid Intelligence. J. Intell. 2020, 8, 1. https://doi.org/10.3390/jintelligence8010001
Schubert A-L, Hagemann D, Löffler C, Frischkorn GT. Disentangling the Effects of Processing Speed on the Association between Age Differences and Fluid Intelligence. Journal of Intelligence. 2020; 8(1):1. https://doi.org/10.3390/jintelligence8010001
Chicago/Turabian StyleSchubert, Anna-Lena, Dirk Hagemann, Christoph Löffler, and Gidon T. Frischkorn. 2020. "Disentangling the Effects of Processing Speed on the Association between Age Differences and Fluid Intelligence" Journal of Intelligence 8, no. 1: 1. https://doi.org/10.3390/jintelligence8010001