Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 17 of 17 for “"Top-down processes"”.
-
Determinants of predator abundance in northern KwaZulu-Natal: top-down or bottom-up?
… (e.g. food limitation, competition) and top-down (e.g. predation, interference) processes play an important role in structuring predator guilds, yet there is a poor understanding of their relative importance. Here, I investigated whether the relative abundance of mesopredators, …
-
Arguments for and field experiments in democratizing digital data collection : the case of Flocktracker
… However, most urban data generation results from top-down processes, driven by government agencies or large companies. This provides limited opportunities for citizens to participate in the ideation and creation of the data used to ultimately gain insights into, and make decisions about, their …
-
ERP correlates of the interactions between top-down and bottom-up processes in visual object categorization
… have been suggested for the underlying processes of such category differences. Both low-level physical differences and higher-level category-specific processes have been shown to modulate the visual ERPs. The present research investigates how physical features (such as amplitude spectrum …
-
Causality and Sense of Agency: A Social-Cognitive Approach with Temporal and Spatial Binding
… experiments were conducted to explore whether top-down processes (knowledge of a causal relationship) were sufficient to produce the binding phenomenon. Chapter 5 investigated extent to which explicit self-report measures used within immanent justice reasoning research replicates with spatial …
-
Reading experience predicts eye movements during online auditory comprehension
… its influence on more low-level word recognition processes, top-down processes, or both. This paper describes two studies that use individual differences in language experience to predict performance in a visual world eyetracking task following Altmann and Kamide (1999). The design allows an …
-
Sensorimotor Processes Underpinning Imitaiton Learning of Biological Motion
… motion models was examined to investigate the processes involved in imitation learning. The purpose of the first experimental chapter, Chapter Two, was to examine the way in which biological motion kinematics were coded during imitation learning by establishing whether imitation of biological …
-
A connectionist explanation of presence in virtual environments
… the perceptual modalities of the user (bottom-up processes), and the mental state of the user (top-down processes). These two basic sources of input competitively spread activation to a central layer which competitively determines which behaviour script will be applied to regulate behaviour. We …
-
The things you do: Implicit person models guide online action observation.
… motor) representations, recent accounts suggest top-down processes where prior knowledge guides perception of others’ actions, in a predictive manner. This thesis investigated how person-specific models of others’ typical behaviour in different situations are reactivated when they are …
-
Falling Head Over Heels: Investigating the higher-level cognitive and electrophysiological processes underlying gait control and falls in older adults and stroke survivors
… identifying the specific higher-level executive processes that play a role in gait control, and examining if these processes are impaired in older adults and stroke survivors with a high risk of falling. Behavioural and electrophysiological measures were used to examine walking gait in both …
-
The Psychology of Ritual: An Empirical Investigation of Ritual’s Regulatory Functions and Psychological Processes
… each function by drawing on bottom-up and top-down processes, and suggest that all forms of ritual are a result of some combination of these two levels of psychological processing. Second, I use the framework to generate testable predictions and outline seven experiments as part of this …
-
Influence of fire and habitat on the removal of invasive plant seeds by granivores in longleaf pine savannas
… for managing such ecosystems, yet the role of top-down processes in mediating fire effects on invasion remain poorly understood. Fire may influence exotic woody plant species through its indirect effects on granivore activity. Given the importance of habitat structure for determining granivore …
-
Neuroimaging and behavioral investigation of declarative memory in South African children prenatally exposed to alcohol
… both directly and indirectly (via bottom-up and top-down processes), a critical cognitive mechanism that supports successful declarative memory functioning (viz., memory encoding), in children with FASD. Data were collected from a sample (N = 88) of South African children with and without PAE. In …
-
Top-Down Control of Lateral Interactions in Visual Cortex
… features (Li et al. 2004). We hypothesized that top-down modulation of effective connectivity within V1 underlies the behaviorally dependent modulations of contextual interactions in V1. To test this idea, we used a chronically implanted multi-electrode array in awake primates and studied the …
-
Predictive inference in reading comprehension: What can biased judgments inform us about information processing in the brain?
… life, requires the engagement of bottom-up and top-down processes in a dynamical way to speed-up processing of incoming information and make decisions about current and future expectations about the meaning of the text. Studies on lexical or syntactic ambiguity resolutions have shown that in …
-
Microfluidic assembly of zein microcapsules
… materials. In addition, the widely used top-down processes such as high-pressure homogenization and microfluidization cannot provide sufficient control on the properties of microcapsules. Those energy-intensive processes also generate substantial shear and heat, which have negative …
-
Seasonal and spatial patterns in nitrogen cycling and food web interactions in Lake Taupō New Zealand
… of nutrient inputs and fisheries. The ecosystem processes that determine functions in oligotrophic lakes are often distinct from those in eutrophic lakes, which are traditionally more actively managed. This is particularly true for nitrogen cycling which, in oligotrophic lakes, is closely coupled …