S2 probability and CNV

S1 modality effects on two components of the contingent negative variation (CNV)

Some effects of cognitive similarity on proactive and retriactive interference in short-term memory

An experiment is reported on the effects of cognitive similarity on proactive and retroactive interference (PI, RI) in short term memory. To avoid confounding between cognitive and acoustic similarity, the materials - i.e. words and digits - were matched with respect to vowel pattern. Effects of both PI and RI were found on recall of words,...

Heart rate deceleration after erroneous responses: A phenomenon complicating the use of heart rate variability for assessing mental load

In an eight-choice reaction task, the influence of erroneous responses upon the temporary changes in the level of heart rate (HR) was studied. It was shown that after errors there was a short-term deceleration of the HR-level, while after correct responses an accelerating tendency was found. This phenomenon has to be regarded as an additional...

Achtergronden van nozemgedrag

The selective process in the functional visual field

The influence of noise on two discrimination tasks

Recent research has revealed that noise effects on work become apparent in an increasingly irregularity of reaction times instead of in a general decrease in the total number of reactions. This paper is concerned with the measurement of the degree of irregularity in two paper-and-pencil tasks. Both tests were performed twice on different days...

Rehearsal and recall in immediate memory

Experiments on the influence of rehearsal on the retention and recoil of digit combinations are described, from the results of which it appears that a rehearsal period facilitates recall by producing a transition from immediate to permanent memory. It further seems that some parts of the material presented reach permanency very quickly, without...

Aandachtsverschuiving en lawaaihinder

Uit verscheidene onderzoekingen is gebleken, dat de regelmaat van de prestatie bij bepaalde taken afneemt als onder lawaai wordt gewerkt. Dit wordt verklaard door een toenemde neiging om de selektieve aandacht een moment van de taak naar het lawaai te verschuiven. Omdat de gebruikte taken in hoofdzaak een beroep doen op de visuele...

Toepassingsmodelijkheden der psychologie in de geneeskunde

Openbare les bij de aanvang van zijn werkzaamheden als privaat-docent voor de toegepaste psychologie aan de Rijks-Universiteit te Leiden gegeven op 18 november 1952.