Research on work environments and health within environmental psychology has mostly focussed on stressful elements in the work setting. Physical characteristics of the environment that might have a positive effect on work performance or health have not been studied to the same degree. The present study focuses on the possible beneficial effects of indoor plants and window view on attention. There is a growing interest for how passive contact with nature can have a positive impact on cognitive functioning. The Attention Restoration Theory (ART) (Kaplan & Kaplan, 1989) is based on the assumption that natural environments can have a restorative effect on attention. Studies on the relation between passive contact with nature and attention have given various results (e.g.; Laumann et al., 2003; Berman et al, 2008). However, the studies are characterised by inconsistent use of attention measurement instruments, assessing different attention functions. Thus, there seems to be a need to differentiate between the tasks and the attention functions in question, in order to broaden the understanding of the human- environment transaction. Objective: The project aims at examining possible effects of indoor natural elements on cognitive performance through a series of controlled experiments. The cognitive tests will be based on the attention model by Michael I. Posner (”orienting”(OF),”alerting”(AF) and ”central executive”(CEF) functions) as described in e.g. Posner & Rothbart (2007). The studies will examine which of these three processes of attention; the capacity of orienting attention, sustain attention over time and the capacity to plan and execute action, is the most vulnerable to environmental factors. By using various attention tests it also seeks to further explore the ART and test its applicability. Methods: The project will comprise of five independent studies. Tests tapping the three differentiated attention functions will be administered under various environmental conditions. The main question to be answered through the series of experiments is whether the environment has an impact on cognitive performance measured by the tests. Secondly, we ask if the quality and/or quantity of natural elements indoors are a moderating factor. Finally, we ask how the potential effect occurs; i. e. the impact of the environment on attention while working versus under pause in between work. Experimental design: An ordinary office setting with systematically different degree of natural elements, such as indoor plants and access to window view to nature, will be utilised. The conditions are assessed by an independent group in a pilot study. Participants will be normally functioning adults, recruited from the student population. The participants are tested individually. Attention capacity is measured three times in interaction with computer; immediately after entering the office, after performing a demanding cognitive task (proof reading), and finally, after a 5 minutes pause. Finally, a short questionnaire on how they experienced the tests and the environment is presented. The total procedure lasts approximately 60 minutes. Results and preliminary results will be presented.