No description available.

No description available.

No description available.

No description available.

No description available.

No description available.

No description available.

Psi is the phenomenon of apparently responding to or receiving information by means other than the recognised senses. Psi information may influence human behaviour, without the individual intending this or even being aware of it. This thesis seeks to investigate nonintentional behavioural responses to psi. We present five empirical studies that investigated nonintentional behavioural responses to psi information. In each study, the psi information was hidden from participants, in that the participants neither had sensory access to it, nor did they know that it existed. Two different combinations of psi information and a behavioural response were examined. The first was the influence of hidden psi information on psychological task performance. The second was the influence of covert, remote observation by hidden observers on the social facilitation effect. In all the studies, the effects of individual differences in participants’ personalities were also considered. In Experiment 1 we investigated whether hidden targets influenced participants’ judgements of the lengths of lines. There was no overall psi effect, but we found a replication of a response bias effect and a significant correlation between psi and participants’ extraversion. In Experiment 2 we investigated whether hidden targets influenced participants’ speed on a maths task. There was no overall psi effect and no correlations between personality and psi scores. We reviewed previous research literature on social facilitation from the novel angle of investigating whether being watched can, in and of itself, lead to the social facilitation effect. Experiments 3, 4, and 5 developed the paradigm of testing for a social facilitation effect from remote observation, investigating whether remote observation leads to the same behavioural changes as knowingly being observed by a physically present person. We compared participants’ performance on psychological tasks under different observation conditions: alone, remotely observed by a hidden observer, and observed by a physically present observer. The expected social facilitation effect was not found in these experiments, leading to a series of improvements to the sampling, methodology, and tasks over the course of these experiments. As the social facilitation effect from a physically present observer was not reliably replicated, these experiments were not conclusive tests of whether there is a social facilitation effect from remote observation. However, there was an indication in Experiment 3 that remote observation does not exert a significant behavioural effect. Considered together, our studies explored novel approaches to examining nonintentional behavioural responses to psi. The significant correlation between participants’ extraversion and psi is, to our knowledge, the first time this effect has been found in a nonintentional psi experiment. This, and the replication of the response bias effect, represent important advances in parapsychology. Our experiments are also the first to test the assumption, inherent in many research designs, that covert observation does not affect participants’ behaviour. Overall, our findings did not support the psi hypothesis.

The ecological success of social insects is frequently ascribed to improvements in task performance due to division of labour amongst workers. While much research has focused on improvements associated with lifetime task specialization, members of colonies can specialize on a given task over shorter time periods. Eusocial bees in particular must collect pollen and nectar rewards to survive, but most workers appear to mix collection of both rewards over their lifetimes. We asked whether bumblebees specialize over timescales shorter than their lifetime. We also explored factors that govern such patterns, and asked whether reward specialists made more foraging bouts than generalists. In particular, we described antennal morphology and size of all foragers in a single colony and related these factors to each forager's complete foraging history, obtained using radio frequency identification (RFID). Only a small proportion of foragers were lifetime specialists; nevertheless, >50% of foragers specialized daily on a given reward. Contrary to expectations, daily and lifetime reward specialists were not better foragers (being neither larger nor making more bouts); larger bees with more antennal olfactory sensilla made more bouts, but were not more specialized. We discuss causes and functions of short and long-term patterns of specialization for bumblebee colonies.

This study contributes to the debate on active and passive portfolio management by providing an alternate means of constructing an active portfolio. This “fusion strategy” has underpinnings in the realm of behavioural finance, namely the value-growth phenomenon and the momentum effect. The fusion strategy developed in this study was compared against two passive benchmarks and four active benchmarks. All returns are calculated net of transaction costs, initially set to 1% per month per share. Statistical testing, done via stochastic dominance, yielded inconclusive results in the majority of cases. The exception however, was that Fund B stochastically dominated the fusion strategy at second order. This implies that a risk-averse investor would prefer to invest in Fund B. By the use of Sharpe and Treynor ratios, the results were also inconclusive. However, the Sortino ratio shows that the fusion strategy outperforms all benchmarks chosen, except Fund A. The performance of the fusion strategy was also not induced by either a sector rotation strategy, the existence of the January effect or by the level of transaction costs.