Normalization by valence and motivational intensity in the sensorimotor cortices (PMd, M1, and S1)

Our brain’s ability to represent vast amounts of information, such as continuous ranges of reward spanning orders of magnitude, with limited dynamic range neurons, may be possible due to normalization. Recently our group and others have shown that the sensorimotor cortices are sensitive to reward value. Here we ask if psychological affect causes normalization of the sensorimotor cortices by modulating valence and motivational intensity. We had two non-human primates (NHP) subjects (one male bonnet macaque and one female rhesus macaque) make visually cued grip-force movements while simultaneously cueing the level of possible reward if successful, or timeout punishment, if unsuccessful. We recorded simultaneously from 96 electrodes in each the following: caudal somatosensory, rostral motor, and dorsal premotor cortices (cS1, rM1, PMd). We utilized several normalization models for valence and motivational intensity in all three regions. We found three types of divisive normalized relationships between neural activity and the representation of valence and motivation, linear, sigmodal, and hyperbolic. The hyperbolic relationships resemble receptive fields in psychological affect space, where a unit is susceptible to a small range of the valence/motivational space. We found that these cortical regions have both strong valence and motivational intensity representations.

An integrative effort : Bridging motivational intensity theory and recent neurocomputational and neuronal models of effort and control allocation

An increasing number of cognitive, neurobiological and computational models have been proposed in the last decade, seeking to explain how humans allocate physical or cognitive effort. Most models share conceptual similarities with motivational intensity theory (MIT), an influential classic psychological theory of motivation. Yet, little effort has been made to integrate such models, which remain confined within the explanatory level for which they were developed, i.e. psychological, computational, neurobiological and neuronal. In this critical review, we derive novel analyses of three recent computational and neuronal models of effort allocation—the expected value of control (EVC) theory, the reinforcement meta-learner (RML) model, and the neuronal model of attentional effort— and establish a formal relationship between these models and MIT. Our analyses reveal striking similarities between predictions made by these models, with a shared key tenet: a non-monotonic relationship between perceived task difficulty and effort mobilization, following a saw-tooth or inverted-U shape. In addition, the models converge on the proposition that the dorsal anterior cingulate cortex (dACC) may be responsible for determining the allocation of effort and cognitive control. We conclude by discussing the distinct contributions and strengths of each theory toward understanding neurocomputational processes of effort allocation. Finally, we highlight the necessity for a unified understanding of effort allocation, by drawing novel connections between different theorizing of adaptive effort allocation as described by the presented models (cognitive, neurobiological, and neuronal levels of analysis).

Possible Impact of Overseas Study on Language Ability and Motivation to Study English

The present study explored whether two semester overseas study programs had any impact on participants’ language ability and motivation to study English. The language ability, L2 learning motivation and learning attitude of 65 Japanese university students participating in semester-long study abroad programs were measured pre departure and on their return. TOEIC listening and reading tests were used to measure students’ linguistic gains, and possible changes to students’ L2 motivation and attitudes were measured using a survey created specifically for the purpose of this study. Statistical analysis implied a significant effect from the two overseas programs on TOEIC scores and motivation and attitude, with motivational intensity prior to departure being a significant predictor of TOEIC gains. The findings underscore the idiosyncratic nature of studying abroad, and will be of use in designing and implementing post-overseas study programs.

Clarity of task difficulty moderates the impact of the explicit achievement motive on physical effort in hand grip tasks

Stable personality dispositions, like motives, are often assumed to exert a direct, stable impact on behavior. This also applies to the explicit achievement motive, which is supposed to influence the behavior that individuals select and how strongly they engage in it. Drawing on motivational intensity theory, we demonstrated in two studies that explicit achievement motive strength only predicted exerted force in a hand grip task if task difficulty was unclear. If task difficulty was clear, explicit achievement motive strength did not influence exerted force. Our findings suggest that the availability of information about the difficulty of motive satisfaction moderates the impact of the explicit achievement motive on behavior.

Factors influencing senior learners’ language learning motivation. A Hungarian perspective

The paper aims to investigate Hungarian senior language learners’ motivational profile with a special attention to factors influencing their motivational intensity. We focused on the significant features of Hungarian senior language learners’ motivational behaviour and conducted a survey with thirty senior Hungarian students learning English as a Foreign Language (FL). This instrument was constructed based on Gardner’s socio-educational model and Tremblay and Gardner’s model of second language (SL) motivation. We performed a series of statistical analyses on the data. The results of multiple regression analyses show that the most influential factors regarding motivational behaviour of older language learners in this context are attitude towards leaning the SL and goal specificity.

Energy investment and motivation: The additive impact of task demand and reward value on exerted force in hand grip tasks

According to motivational intensity theory, individuals are motivated to conserve energy when pursuing goals. They should invest only the energy required for success and disengage if success is not important enough to justify the required energy. We tested this hypothesis in five experiments assessing exerted muscle force in isometric hand grip tasks as indicator of energy investment. Our results provided mixed evidence for motivational intensity theory. Corroborating its predictions, energy investment was a function of task demand. However, we did not find evidence for the predicted disengagement, and we observed that participants exerted in most conditions more force than required. Furthermore, the data could be better explained by a model that predicted an additive effect of task demand and success importance than by models drawing on motivational intensity theory’s predictions. These results illustrate the strong link between energy investment and task demand but challenge motivational intensity theory’s primacy of energy conservation.