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Portrait of Marc Jekel
Marc Jekel

Dr. phil. · Social Psychology, University of Cologne

Google Scholar University profile E-mail

Overview

Research interests

Information distortion, coherence-based reasoning, parallel-constraint satisfaction, intuition, open science, social decision-making, probabilistic reasoning, methods.

Education

Dr. phil., 2012
Rheinische Friedrich-Wilhelms-Universität Bonn

Dipl.-Psych., 2006
Ruprecht-Karls Universität Heidelberg

Publications & service

The full publication list is available on Google Scholar.

Associate Editor
Journal of Behavioral Decision Making (Wiley)

Projects

Coherence-based Reasoning

Coherence-based Processes in (Non-)Strategic Social Decision-Making

Started February 2025

DFG Research Grant · Marc Jekel

Coherence-Based Reasoning: Modelling Integration and Search of Sequentially Presented Information

Started February 2021, Ended 2025

DFG Research Grant · Marc Jekel

Meta-Science

Applying Principles from the Validity-Based Framework of Replication in Metastudies to Test Causal Relations

Started February 2025

DFG Research Grant · Marc Jekel · META-REP (SPP 2317)

Replicating Failed Replications: A Validity-based Framework for Predicting Replication Success

Started February 2022

DFG Research Grant · Marc Jekel · META-REP (SPP 2317)

Apps

All apps at a glance: apps.marc-jekel.de →

Parallel Constraint Satisfaction (PCS) Models

Schematic of the PCS social decision network: payoff, utility and option nodes

PCS Social Decision-Making

Model simulation.

Schematic of the PCS decision-making network: source node, cue nodes and two option nodes

PCS Network Model of Decision Making

Simulation of the PCS network model of decision making.

Schematic of the PCS risky-choice network: driver, outcome nodes and two gamble nodes

PCS Network Model of Risky Choice

Simulation of the PCS network model of risky choice.

Schematic of the Sequential-iCodes network with information, evaluation and option nodes

Sequential-iCodes

Model simulation.

Other Models

Sketch of the prospect-theory value function

Cumulative Prospect Theory

Model simulation.

Sketch of random-walk paths between two decision criteria and a decision-time histogram

Random-walk model

Simple random-walk model.

Sketch of two Rescorla-Wagner learning curves

Rescorla-Wagner Modell

Rescorla-Wagner model functions.

Sketch of a Stevens power function and a Weber-Fechner logarithmic function

Weber-Fechner und Stevens Modell

Psychophysics functions.

Methods

Sketch of a polytope with a small fairy

Modeling for Everyone

Additional resource website for accessible computational modeling materials.

Sketch of a result table with choices, decision times, confidence and the classified strategy

Multiple-Measure Maximum Likelihood Strategy Classification

Strategy classification app.

Sketch of a score histogram and confidence intervals on z, T and IQ scales

Interpretation von Testergebnissen

z-Skala, T-Skala, IQ-Skala, Reliabilität, Messfehler, Konfidenzintervall.

Open Science

Sketch of a boxplot of significant p-values with the .05 line

Optional Stopping and Alpha-Error

Effect of optional stopping on alpha-error.

Sketch of power-analysis histograms

Power, p-value Distribution, Effect Size Distribution

Relation between effect size, p-value distribution, n, alpha-error, and power.

Teaching

Teaching Areas

University of Cologne
Attitude and attitude change; scientific method; sensation and perception; diagnostics for school teachers; social cognition, decision-making, introduction to social psychology (lecture), practicals.

FernUniversität in Hagen
Statistical analyses and open science; artificial neuronal networks in psychology; computational modeling of learning.

University of Göttingen
Test theory; cognitive modeling; item-response theory.

University of Bonn
Computer assisted data analysis; introduction to R; empirical-experimental practical; introduction to psychology; psychology of emotions.

Example Decks for Teaching

Course website Master Practicum Experimental project seminar Experimental Practicum in the Master Program Project-based teaching, materials, workflow, and course organization Open website ↗

Workshop Cognitive Modeling Process-oriented approaches Cognitive Modeling Models of cognition, formalization, and computational perspectives Open deck ↗

Advanced statistics Panel Data / MLM Complex regression models Panel Data Analysis / Complex (Multilevel) Regression Models Longitudinal and multilevel modeling for applied data analysis Open deck ↗

Theory + methods IRT / Rasch Probabilistic test theory Item Response Theory / Rasch Modeling Test theory, measurement, model assumptions, parameter estimation Open deck ↗

Contact

Marc Jekel
Universität zu Köln
Sozialpsychologie
Richard-Strauss-Str. 2
50931 Köln | Germany
marc.jekel@uni-koeln.de

 

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