The atmospheric and solar neutrino oscillation data suggest hierarchical neutrino masses with at least one large mixing. The simplest seesaw models for reconciling the two features are U (1) extensions of the SM with flavour dependent gauge charges. I discuss a minimal model of this type containing two heavy right-handed neutrinos, which have normal Dirac couplings to ν µ and ν τ but suppressed...

Matching two different images of a face is a very easy task for familiar viewers, but much harder for unfamiliar viewers. Despite this, use of photo-ID is widespread, and people appear not to know how unreliable it is. We present a series of experiments investigating bias both when performing a matching task and when predicting other people's performance. Participants saw pairs of faces and wer...

This study was to investigate the information volume of road sign and level of visibility using real road sign. Five road signs of 5and 10-letter word combinations were shown randomly to the subject for 2 to 3 seconds at 30 meters initially. The road sign was moved closer to subject, 1 meter at a time until the subject saw the road sign correctly. The distance of first correct response demonstr...

Three experiments were designed to clarify the perplexing ability of subjects to discriminate between to-be-remembered (TBR) and to-be-forgotten (TBF) items in memory. After the presentation of each pair of words in a list, subjects were first required to solve one to four arithmetic problems and were then cued whether to remember or forget that pair. When subjects were free to use a remember (...

great understanding, attractively produced, with an admirable selection of illustrations, it may well be a means of introducing her achievements to a , wider public. As a student in Birmingham, working under Mr. Catterson-Smith, she learnt to rely on her visual powers rather than on technical skill. Later, as a teacher, she saw that children worked best when painting from their own mental image...

People overestimate their knowledge, at times claiming knowledge of concepts, events, and people that do not exist and cannot be known, a phenomenon called overclaiming. What underlies assertions of such impossible knowledge? We found that people overclaim to the extent that they perceive their personal expertise favorably. Studies 1a and 1b showed that self-perceived financial knowledge positi...

I recently reflected on whether developmental behavioral pediatrics (DBP) is on the right track. Along with most section members of my generation, I first became involved with clinical care, teaching, and research activities as a general pediatrician (not a subspecialist) and saw and continue to view development and behavior (DB) as the foundation of pediatrics. This generalist perspective may ...

It was hypothesized that Ss scoring high on a derived scale of Fear of Death and Illness would exhibit more signs of behavior disruption than Ss scoring low after seeing a film describing the effects of fatal disease. 22 Ss were used: 12 scoring high on the scale and 10 scoring low. i of each group saw a threatening film, and i saw a nonthreatening educational film. All Ss took the Digit Symbol...

Three studies are reported investigating how monolinguals and bilinguals resolve within-language competition when listening to isolated words. Participants saw two pictures that were semantically-related, phonologically-related, or unrelated and heard a word naming one of them while event-related potentials were recorded. In Studies 1 and 2, the pictures and auditory cue were presented simultan...