Bottom-Up and Top-Down Effects Influence Bruchid Beetle Individual Performance but Not Population Densities in the Field

Bottom-Up and Top-Down Effects Influence Bruchid Beetle Individual Performance but Not Population Densities in the Field

Plant quality (bottom-up) and natural enemies (top-down) can influence the individual performance of herbivorous insects on their host plants, but few studies measured at the same time the influence on population densities in the field. We investigated if plant quality of different wild common bean populations, Phaseolus vulgaris L. (Fabaceae), affects the performance of the bean weevil, Acanth...

Individual Differences in Top-down and Bottom-up Prominence Perception

The perception of prosody, like other aspects of speech perception, relies on a combination of bottom-up and top-down information. In the context of prominence perception, the present study explored the interaction of these two types of cues, and individual variation in their effects on listeners. In a “naïve prosody transcription” task, 120 listeners gave prominence ratings to verbs and object...

Bottom-up, top-down

Distinguishing Top-Down From Bottom-Up Effects

The distinction between top-down and bottom-up effects is widely relied on in experimental psychology. However, there is an important problem with the way it is normally defined. Top-down effects are effects of previously-stored information on processing the current input. But on the face of it that includes the information that is implicit in the operation of any psychological process – in its...

Relative Influence of Bottom-Up and Top-Down Attention

Attention and memory are very closely related and their aim is to simplify the acquired data into an intelligent structured data set. Two main points are discussed in this paper. The first one is the presentation of a novel visual attention model for still images which includes both a bottom-up and a top-down approach. The bottom-up model is based on structures rarity within the image during th...