A learning rule that explains how rewards teach attention

Many theories propose that top-down attentional signals control processing in sensory cortices by modulating neural activity. But who controls the controller? Here we investigate how a biologically plausible neural reinforcement learning scheme can create higher order representations and top-down attentional signals. The learning scheme trains neural networks using two factors that gate Hebbian plasticity: (1) an attentional feedback signal from the response-selection stage to earlier processing levels; and (2) a globally available neuromodulator that encodes the reward prediction error. We demonstrate how the neural network learns to direct attention to one of two coloured stimuli that are arranged in a rank-order. Like monkeys trained on this task, the network develops units that are tuned to the rank-order of the colours and it generalizes this newly learned rule to previously unseen colour combinations. These results provide new insight into how individuals can learn to control attention as a function of reward contingency.     

The Cross‐cultural Transportability of Situational Judgment Tests: How does a US‐based integrity situational judgment test fare in Spain?

Despite the globalization of HRM, there is a dearth of research on the potential use of contextualized selection instruments such as situational judgment tests (SJTs) in other countries than those where the selection instruments were originally developed. Therefore, two studies are conducted to examine the transportability of an integrity SJT that was originally developed in the United States to a Spanish context. Study 1 showed that most SJT scenarios (16 out of 19) that were developed in the United States were also considered realistic in a Spanish context. In Study 2, the item option endorsement patterns converged to the original scoring scheme, with the exception of two items. In addition, there were high correlations between the original US empirical scoring scheme and two empirical scoring schemes that were tailored to the Spanish context (i.e., mode consensus scoring and proportional consensus scoring). Finally, correlations between the SJT integrity scores and ratings on a self‐report integrity measure did not differ significantly from each other according to the type of scoring key (original US scoring vs. Spanish scoring keys). Overall, these results shed light on potential issues and solutions related to the cross‐cultural use of contextualized selection instruments such as SJTs.     

In hindsight, life flows from left to right

Three experiments investigated the mental representation of meaningful event sequences. Experiment 1 used extended (5 min long) naturalistic scenes excerpted from commercial movies. Experiments 2 and 3 presented everyday activities by means of sequences of six photographs. All experiments found both left–right and distance effects in an order decision task, suggesting that when contemplated in hindsight, experienced events unfold along a left-to-right analogical mental line. Present results are discussed in the context of the mental representation of other kinds of ordinal sequences, and other left–right effects reported in non-ordinal domains.     

Blocking with serial compound stimuli: The role of local context and second-order associations

Blocking was studied with rats in two serial conditioning experiments in which CS1 was followed by CS2 and then shock. Experiment 1 demonstrated that pretraining with CS1 was able to block conditioning to CS2 when the pretraining consisted of trace conditioning. But when serial conditioning was used for pretraining, with a third stimulus as the second element of the compound, then blocking was not detected during the subsequent phase. In Experiment 2 the effect of pretraining with CS2 on blocking with CS1 was examined. Blocking was effective, but only when steps were taken to minimize the growth of second-order associations resulting from the pairing of CS1 with CS2. These results are consistent with a principle stating that the ability of a pretrained stimulus to block the added stimulus in a compound depends on the relative contiguity of each stimulus to the US.     

Equivalent Stimuli are more Strongly Related after Training With Delayed Matching Than after Simultaneous Matching: A Study Using the Implicit Relational Assessment Procedure (IRAP)

The Psychological Record - Bortoloti and de Rose (2009) found evidence that the level of functional transfer is higher in equivalence classes generated by delayed matching to sample (DMTS) than in...