Acknowledgements	6
	Preface	7
	Table of Contents	9
	1 Introduction	15
	1.1 Motivation and Intention	16
	1.2 Laboratory-based Evaluation in IR	18
	1.3 Some Problems of Laboratory-based Evaluation in IR	20
	1.4 Extension of the Laboratory-based Evaluation in IR	23
	1.5 Models in the Domain of IS&R	24
	1.6 The Structure of the Book	30
	1.7 Some Central Concepts	33
	2 The Cognitive Framework for Information	36
	2.1 The Cognitive View	36
	2.2 The Cognitive Information Concept in IS&R	44
	2.3 Implications of the Cognitive Information Conception	56
	2.4 Information Acquisition: From Sensory Data to Scientific Discovery	60
	3 The Development of Information Seeking Research	68
	3.1 Research Questions and Findings	69
	3.2 Research Methods	99
	3.3 Limitations and Open Problems	115
	4 System-Oriented Information Retrieval	123
	4.1 Models in System-Oriented IR Research	126
	4.2 Major Developments of System-oriented IR Research	132
	4.3 Documents, Requests and Relevance: Issues and Findings	135
	4.4 Indexing, Classification and Clustering: Issues and Findings	142
	4.5 Interfaces and Visualization: Issues and Findings	147
	4.6 Interaction and Query Modification: Issues and Findings	152
	4.7 Natural Language Processing: Issues and Findings	162
	4.8. Expert Systems and Interfaces for IR: Issues and Findings	174
	4.9 Research Methods	182
	4.10. Novel Test Collections and Performance Measures	190
	4.11 Limitations and Open Problems	198
	5 Cognitive and User-Oriented Information Retrieval	202
	5.1 Models for Cognitive IR Research	206
	5.2 Cognitive IS&R Theory Building: ASK – Polyrepresentation: Issues and Findings	214
	5.3. Searchers’ Behavior, Cognitive Models and Styles – Issues and Findings	225
	5.4. Standard Online IR Interaction – Issues and Findings	228
	5.5. Web IR Interaction	236
	5.6 Searcher-Associated Best Match IR Interaction	242
	5.7 Relevance: Issues and Findings	245
	5.8 Research Methods	255
	5.9 Interactive IR Evaluation Methods: Simulated Work Task Situations	262
	5.10 Central Achievements, Limitations and Open Problems	265
	6 The Integrated IS&R Research Framework	270
	6.1 Building the Conceptual Framework	274
	6.2 Approaching the complexity of IS&R	285
	6.3 Characteristics of the IS&R model: a summary	316
	7 Implications of the Cognitive Framework for IS& R	323
	7.1 Design and Evaluation Frameworks for IS&R	326
	7.2 Variables of the Organizational Task Dimensions	334
	7.3 Actor and Perceived Task Dimensions of Variables	341
	7.4 Document and Source Types: Range of Variables	350
	7.5 Algorithms and System Components: Dimensions of Variables	354
	7.6 Access Types: Variables of Interaction	361
	7.7 The Multidimensional Research Design Cube	366
	8 Towards a Research Program	368
	8.1 Information Objects, IT and Natural Task Contexts	370
	8.2 Information Objects, IT and Actors	373
	8.3 Information Objects, Interface and Actors	377
	8.4 Interfaces, Actors and Socio-organizational Contexts	379
	8.5 Methodological Caveats and Summary	383
	9 Conclusion	386
	Definitions	390
	References	402
	Index	445