The influence of fairness on adaptive episodic memory: The moderating role of relative reward

doi:10.3724/SP.J.1041.2025.1201

Acta Psychologica Sinica ›› 2025, Vol. 57 ›› Issue (7): 1201-1215.doi: 10.3724/SP.J.1041.2025.1201

• Reports of Empirical Studies • Previous Articles Next Articles

The influence of fairness on adaptive episodic memory: The moderating role of relative reward

LONG Yiting, JIANG Yingjie(), YUAN Yuan, ZHANG Xiaojin, CONG Peiyao, GUO Yanlin

School of Psychology, Northeast Normal University, Changchun 130024, China

Published:2025-07-25 Online:2025-04-24
Contact: JIANG Yingjie, E-mail: jiangyj993@nenu.edu.cn

LONG Yiting, JIANG Yingjie, YUAN Yuan, ZHANG Xiaojin, CONG Peiyao, GUO Yanlin. (2025). The influence of fairness on adaptive episodic memory: The moderating role of relative reward. Acta Psychologica Sinica, 57(7), 1201-1215.

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URL: https://journal.psych.ac.cn/acps/EN/10.3724/SP.J.1041.2025.1201

https://journal.psych.ac.cn/acps/EN/Y2025/V57/I7/1201

Figures/Tables 4

Figure 1. The procedure of Experiment 2.

Figure 1. The procedure of Experiment 2.

Table 1 The Influence of Absolute/Relative Rewards and Fairness on Episodic Memory Performance.

Variables	F	p	η²_p
Experiment 1 (n = 38)
absolute reward	0.86	0.361
fairness	10.33	<0.001	0.22
absolute reward * fairness	1.46	0.239
Experiment 2 (n = 33)
relative reward	2.06	0.161
fairness	1.70	0.192
relative reward * fairness	14.09	<0.001	0.31
Experiment 3 (n = 33)
relative reward	0.53	0.474
fairness	2.68	0.076
relative reward * fairness	6.62	0.002	0.17

Table 1 The Influence of Absolute/Relative Rewards and Fairness on Episodic Memory Performance.

Variables	F	p	η²_p
Experiment 1 (n = 38)
absolute reward	0.86	0.361
fairness	10.33	<0.001	0.22
absolute reward * fairness	1.46	0.239
Experiment 2 (n = 33)
relative reward	2.06	0.161
fairness	1.70	0.192
relative reward * fairness	14.09	<0.001	0.31
Experiment 3 (n = 33)
relative reward	0.53	0.474
fairness	2.68	0.076
relative reward * fairness	6.62	0.002	0.17

Figure 2. Effects of reward and fairness on episodic memory performance (error bars represent standard errors).

Figure 2. Effects of reward and fairness on episodic memory performance (error bars represent standard errors).

Table 2 The results of the mixed linear model for the cooperation rates

variables	B	Std	t	p	95% CI
Experiment 2 (n = 33)
intercept	0.26	0.05	5.39	< 0.001	[0.17, 0.36]
relative reward : reward memory	0.14	0.03	4.35	< 0.001	[0.08, 0.21]
High fairness : fairness memory	0.46	0.07	6.42	< 0.001	[0.32, 0.60]
medium fairness : fairness memory	0.10	0.08	1.25	0.213	[−0.06, 0.25]
low fairness : fairness memory	−0.20	0.08	−2.41	0.017	[−0.36, −0.04]
Experiment 3 (n = 33)
intercept	0.33	0.05	6.54	< 0.001	[0.23, 0.43]
relative reward : reward memory	0.003	0.001	3.54	< 0.001	[0.001, 0.004]
High fairness : fairness memory	0.20	0.09	2.11	0.036	[0.01, 0.38]
medium fairness : fairness memory	0.001	0.09	0.01	0.992	[−0.18, 0.18]
low fairness : fairness memory	−0.31	0.10	−3.10	0.002	[−0.51, −0.12]

Table 2 The results of the mixed linear model for the cooperation rates

variables	B	Std	t	p	95% CI
Experiment 2 (n = 33)
intercept	0.26	0.05	5.39	< 0.001	[0.17, 0.36]
relative reward : reward memory	0.14	0.03	4.35	< 0.001	[0.08, 0.21]
High fairness : fairness memory	0.46	0.07	6.42	< 0.001	[0.32, 0.60]
medium fairness : fairness memory	0.10	0.08	1.25	0.213	[−0.06, 0.25]
low fairness : fairness memory	−0.20	0.08	−2.41	0.017	[−0.36, −0.04]
Experiment 3 (n = 33)
intercept	0.33	0.05	6.54	< 0.001	[0.23, 0.43]
relative reward : reward memory	0.003	0.001	3.54	< 0.001	[0.001, 0.004]
High fairness : fairness memory	0.20	0.09	2.11	0.036	[0.01, 0.38]
medium fairness : fairness memory	0.001	0.09	0.01	0.992	[−0.18, 0.18]
low fairness : fairness memory	−0.31	0.10	−3.10	0.002	[−0.51, −0.12]

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