Is the Long Memory Factor Important for Extending the Fama and French Five-Factor Model: Evidence from China

This paper proposes a new factor model, which is built upon the marriage of the Fama and French five-factor model and a long memory factor based on the monthly data of the A-share market in the Chinese stock market from January 2010 to July 2020. We first examine the explanatory power of the Fama and French five-factor model. We find strong market factor return of market (RM), size factor small minus big (SMB), and value factor high minus low (HML) but weak factor robust minus weak (RMW) and investment factor conservative minus aggressive (CMA). Then, both the Hurst exponent and the momentum factors (MOM) are added to the model to test the improvement of the explanatory power of these two new factors. We find that both the momentum factor and the Hurst exponent factor can effectively improve the explanatory power of the model. The momentum factor captures the short-term trend, but it cannot completely replace the Hurst exponent, which reflects the long memory effect.

How punishment and memory mechanism affect cooperative emergence in prisoner’s dilemma game

To remember or forget our acquaintances’ strategies can influence our decision-making significantly. In this paper, we explore the evolutionary prisoner’s dilemma (PD) game model with punishment and memory mechanism in the time-varying network. Our results show that a larger temptation gain [Formula: see text] or a larger the number of connected edges of activated individuals [Formula: see text] would result in the decrease of the final fraction of cooperators. However, with the increase of the maximum penalty cost, the maximum punishment intensity or the value of individual’s “memory factor”, players are more inclined to choose cooperative strategy. In addition, an effective way to promote the cooperation is to improve the social subsidy. Remarkably, only when the social subsidy is greater than the temptation gain, the density of cooperators could increase significantly. Interestingly, there is a linear relationship between the threshold of social subsidy and the temptation gain. The final results show that ones’ activity rates have no significant correlation with their strategies.

I Rate My Memory Quite Similar at Age 40 and at Age 70

In 1987, we administered a subjective memory questionnaire to 143 40-year-old men, and 30 years later 67 of them again responded to the same questionnaire at age 70. At the follow-up, we also instructed participants to answer the questionnaire in the same manner as they thought they did at age 40 and to perform a picture recognition and a public event test. We employed confirmatory factor analysis to model a latent subjective memory construct. A single-factor solution provided acceptable model fit to data (χ2(12) = 9.33, p = .68; χ2(12) = 10.48, p = .57) and a decent reliability at both ages for the subjective memory measurements (omega = .82 and .93, respectively). Our longitudinal invariance testing revealed only a partial weak invariance. We also fitted a latent change-score model to the data. As expected, participants on average rated their memory as poorer at age 70 than at 40. Those who reported better overall health and less anxiety reported less memory decline up to age 70. Notably, this was also the case for those who rated memory as worse at age 40. Higher stress and depression at age 70, however, were associated with worse subjective memory already at age 40. The correspondences between memory ratings and tests were low. The correlation between the subjective memory factors at age 40 and 70 was 0.58, while the correlation between the memory factor at age 70 and the retrospective subjective memory factor was 0.87. Our findings suggest that subjective memory is quite consistent, and that we are inclined to preserve the continuity of our own memory functioning over the adult lifespan.

The French language substratum in Vladimir Nabokov’s English memoirs discourse: stylistic play or text formation pattern?

The paper deals with the memoirs discourse which is regarded as a separate type of discourse whose nature is specified by the «memory factor». In order to investigate the role of «memory factor» in memoirs text-formation the author analyses one of the most famous case in memoirs practice of XX century — Vladimir Nabokov’s «Speak, Memory» (1966). This third version of Nabokovian memoirs written in English is fulfilled with numerous French and Russian insertions which provoke the discussion on multilingualism and code-switching, a topical issue in the modern study of Nabokov’s verbal practice and his text-forming techniques. The major object of analysis in the paper concerns French lexical and syntactical units which form as a whole a certain substratum in the repertoire of the multilinguistic means represented in this text. The description of the French substratum concluding various units (words, word combinations, phrases, quotations, phraseological units, sentences) with different functions in the sentence allowed to identify 8 types. They were interpreted according to the memoirs text-formation model proposed in the earlier publications of the author, and the analysis showed that almost all French insertions represent the substructure of Nabokov’s text which is determined by the «memory factor». Most of these nominative means in their functioning in the text contain the reference to some significant situation, event, or picture of the past and in their verbal images they are conceptualized by the memoirist as an inalienable part of the referential situation. The study of the data also proves that the use of French insertions in this memoirs text is nothing to do with the ludic aspect of text-formation, with linguistic games which are often considered as a constant of Nabokov’s works.

La experiencia del espectador-usuario como factor primordial para la adecuación del modelo expositivo de un proyecto de arte relacionado con el genocidio, basado en fotografías socio-documentales = The viewer-user experience as a fundamental factor for the adaptation of the exhibition model of an art project related to genocide, based on socio-documentary photographs

El presente artículo tiene como objetivo realizar una reflexión sobre la importancia de la experiencia de usuario en las obras de arte basadas en fotografía socio-documental, referido en concreto al proyecto artístico GENOCIDE PROJECT. Se trata de verificar cómo el factor memoria del usuario es importante a la hora de exponer la obra al público. La experiencia del espectador-usuario se fundamenta en tres elementos: arte, usuario y contexto. La configuración de estos elementos define las dos experiencias relatadas, en las que el espectador-usuario se convierte en el componente decisivo en el diseño y elaboración del modelo expositivo.AbstractThis article aims to reflect on the importance of user experience in artistic works based on socio-documentary photography, specifically referring to the artistic project GENOCIDE PROJECT. It is about verifying how the user's memory factor is important when exposing the work to the public. The experience of the viewer-user is based on three elements: art, user and context. The configuration of these elements will define the two experiences reported, in which the viewer-user becomes the decisive component in the design and development of the exhibition model.

Addressing the ``Replication Crisis'' in Sports Neuropsychology: Validation of the Two-Factor Theory of ImPACT

Purpose The "replication crisis" in psychology and across the broader field of social sciences raises criticism due to a lack of data to show that esoteric research findings can be replicated. The present study replicated and validated the two-factor “memory” and “speed” structure of ImPACT (Schatz & Maerlender, 2013). Methods High school aged athletes (N=18,918, Mean age=15.4, SD=1.2) who completed pre-season baseline ImPACT testing were randomly assigned to one of 5 independent samples of approximately 3,780 athletes. Exploratory factor analyses (FA) for a two-factor solution were conducted with ImPACT composite scores within each of the five groups. Post-Concussion Symptom Scale (PCSS) scores were included, with the expectation they would load on a third, unique factor. Results All five samples met assumptions for FA (KMO Measure of Sampling Adequacy above .600), and all five analyses yielded the same “memory” and “speed” two-factor structure. Visual Motor Speed and Reaction Time loaded on the first "Speed" factor and Verbal and Visual Memory loaded on a second "Memory" factor. The PCSS scores loaded on a third, unique “symptom” factor. Conclusion Replication of the two-factor structure for ImPACT in a five large high school sample further validates the model. Given that both visual and verbal memory involve encoding of information presented visually, use of a “memory” factor may improve interpretation of ImPACT scores. Similarly, similarities between constructs measuring speed of responding (Reaction Time) and speed of processing (Visual Motor Processing Speed) may be best explained using a “speed” factor.