The Need for a Revolution in the Philosophy of Science

There is a need to bring about a revolution in the philosophy of science, interpreted to be both the academic discipline, and the official view of the aims and methods of science upheld by the scientific community. At present both are dominated by the view that in science theories are chosen on the basis of empirical considerations alone, nothing being permanently accepted as a part of scientific knowledge independently of evidence. Biasing choice of theory in the direction of simplicity, unity or explanatory power does not permanently commit science to the thesis that nature is simple or unified. This current ‘paradigm’ is, I argue, untenable. We need a new paradigm, which acknowledges that science makes a hierarchy of metaphysical assumptions concerning the comprehensibility and knowability of the universe, theories being chosen partly on the basis of compatibility with these assumptions. Eleven arguments are given for favouring this new ‘paradigm’ over the current one. This revised version was published online in August 2006 with corrections to the Cover Date.     

A New Task for Philosophy of Science

This paper argues that we philosophers of science have before us an important new task that we urgently need to take up. It is to convince the scientific community to adopt and implement a new philosophy of science that does better justice to the deeply problematic basic intellectual aims of science than that which we have at present. Problematic aims evolve with evolving knowledge, that part of philosophy of science concerned with aims and methods thus becoming an integral part of science itself. The outcome of putting this new philosophy into scientific practice would be a new kind of science, both more intellectually rigorous and one that does better justice to the best interests of humanity.     

How Readability Shapes Social Media Engagement

We suggest that text readability plays an important role in driving consumer engagement on social media. Consistent with a processing fluency account, we find that easy‐to‐read posts are more liked, commented on, and shared on social media. We analyze over 4,000 Facebook posts from Humans of New York, a popular photography blog on social media, over a 3‐year period to see how readability shapes social media engagement. The results hold when controlling for photo features, story valence, and other content‐related characteristics. Experimental findings further demonstrate the causal impact of readability and the processing fluency mechanism in the context of a fictitious brand community. This research articulates the impact of processing fluency on brief word‐of‐mouth transmissions in the real world while empirically demonstrating that readability as a message feature matters. It also extends the impact of processing fluency to a novel behavioral outcome: commenting and sharing actions.     

Genetic enhancement: plan now to act later

All three main articles in the issues of the Kennedy Institute of Ethics Journal endorse the view that genetic enhancement should be permitted, including human germ-line genetic enhancement. However, unregulated, wealth-based access to genetic enhancement in general, and germ-line enhancement in particular, would create intolerable risks for society. Although there are a number of practical problems raised by proposals to regulate or restrict access to genetic enhancement, which will make it difficult if not impossible to muster support for any effective restrictions until we begin to experience the societal problems that genetic enhancement will create, it is important to consider now what restrictions would be appropriate, how they would be imposed, and what changes would be needed in existing laws and institutions to facilitate them. Without this type of groundwork, there is no way society will be in a position to act in time.     

Power in randomized group comparisons: the value of adding a single intermediate time point to a traditional pretest-posttest design

Adding a pretest as a covariate to a randomized posttest-only design increases statistical power, as does the addition of intermediate time points to a randomized pretest-posttest design. Although typically 5 waves of data are required in this instance to produce meaningful gains in power, a 3-wave intensive design allows the evaluation of the straight-line growth model and may reduce the effect of missing data. The authors identify the statistically most powerful method of data analysis in the 3-wave intensive design. If straight-line growth is assumed, the pretest-posttest slope must assume fairly extreme values for the intermediate time point to increase power beyond the standard analysis of covariance on the posttest with the pretest as covariate, ignoring the intermediate time point.     

The elusive matching bias effect in the disjunctive selection task

When reasoning with conditional statements (i.e., if [not] p then [not] q), for example when solving Wason's selection task, subjects tend to display matching bias: Options which match the entities named in the rule tend to be selected irrespective of whether this is logically appropriate. Recently, there have been suggestions that the underlying causes of matching bias reflect a general phenomenon that applies to many types of logical rule, not just conditionals. A study is reported in which performance is investigated for selection tasks with categorical or disjunctive rules. Although matching bias was clearly present for categorical rules, inverted matching bias was identified for disjunctive rules, calling into question the generality of the phenomenon and its explanations. In addition, performance at one task was not correlated with performance at the other, calling into question recent cognitive capacity accounts of selection task performance.     

The role of motion direction selective extrastriate regions in reading: a transcranial magnetic stimulation study

Why reading ability is correlated with motion processing ability is perplexing. Activity in motion direction processing regions (Area V5/MT+) was perturbed by means of repetitive transcranial magnetic stimulation (rTMS) to examine its effect on reading. A functional probe (significant shortening of the motion aftereffect) was used to identify Area V5/MT+. Right-handed participants (8 m, 8 f) received three 7.5 min blocks of rTMS, after which two phonological and one orthographic reading tasks were administered. Application of rTMS to Area V5/MT+ (as compared to a non-rTMS baseline) significantly decreased performance only during non-word naming. The pattern of naming errors and the absence of deficits on the second phonological task were not consistent with a role for Area V5/MT+ in phonological decoding. Instead, its role in reading may be limited to image stabilization and/or letter localization.     

Sample size and multiple regression analysis

Despite the development of procedures for calculating sample size as a function of relevant effect size parameters, rules of thumb tend to persist in designs of multiple regression studies. One explanation for their persistence may be the difficulty in formulating a reasonable a priori value of an effect size to be detected. This article presents methods for calculating effect sizes in multiple regression from a variety of perspectives and also introduces a new method based on an exchangeability structure among predictor variables. No single method is deemed superior, but rather examples show that a combination of methods is likely to be most valuable in many situations. A simulation provides a 2nd explanation for why rules of thumb for choosing sample size have persisted but also shows that the outcome of such underpowered studies will be a literature consisting of seemingly contradictory results.     

The impact of task difficulty expectations on intrinsic motivation

Two studies investigated expectations of task difficulty induced prior to task involvement and their impact upon an individual's subsequent intrinsic interest. Expectations of task difficulty were manipulated through easy/hard instructions by the experimenters. Interest, but not performance, varied as function of expected task difficulty, with “easy” eliciting greater interest than “hard” instructions. The generality of this finding was supported by its demonstration in studies utilizing different experimenters (male, female), subject populations (children, college), and tasks (perceptual-motor, cognitive).     

The “Three Rs” of Sex

Summary We have seen that sex has three functions, the reproductive, the relational, and the recreational. We have shown it probable that a great deal of unnecessary marital conflict comes from one party holding relational sex to be all-important while the other considers recreational sex to be of more importance. Finally, we have indicated that it is most likely that if they can compromise this difficulty by each meeting the other on his own ground a part of the time, much of the haggling will stop and many unnecessary divorces will be avoided.The Rev. Maxwell H. Morris, Th.D., following studies in the Old Testament and ancient history in the University of Oregon, the University of Washington, and the University of Southern California, spent a year in Jewish studies at the Hebrew Union College for Rabbinical Studies in Cincinnati. His interest in the psychology of sex grew out of his attempts to understand phallic and fertility cults.