Information seeking research often reports about types of information resources, ways of acquiring them and opinions on their importance in various professions. Based on self-reporting, these ...findings are affected by human memory and rationalisation. This article proposes a new way of studying information resource use – based on dwell time in the context provided by concrete work tasks. We use log data of 21 information workers from six organisations to analyse how work task complexity is connected to the time used in various information resources; how task complexity is connected to information resource use in different task types. Unlike traditionally, our findings consist of objective data on which resource types are used, and for how long, in work tasks of varying complexity and type. For example, the findings suggest that growing work task complexity increases the dwell time in local personal computer (PC) resources; these resources are especially popular in intellectual tasks. Such findings help understand factors affecting information resource use. Likewise, they help focus attention on most time-consuming aspects of task-based information interaction when developing support for work.
FM Miamaria Saastamoisen informaatiotutkimuksen ja interaktiivisen median alaan kuuluva väitöskirja Information searching in authentic work tasks: A field study on the effects of task type and ...complexity (Tiedonhaku aidoissa työtehtävissä: Kenttätutkimus tehtävätyypin ja monimutkaisuuden vaikutuksista) tarkastettiin 14.1.2017 Tampereen yliopistossa. Vastaväittäjänä toimi professori Katriina Byström (Oslo and Akershus University College of Applied Sciences, Norway) ja kustoksena yliopistolehtori Jaana Kekäläinen (Tampereen yliopisto). Väitöskirja on julkaistu sarjassa Acta Universitatis Tamperensis ja se on luettavissa myös Tampereen yliopiston Tampub-julkaisuarkistossa osoitteessa http://urn.fi/URN:ISBN:978-952-03-0310-5.
Understanding users' search behavior has largely relied on the information available from search engine logs, which provide limited information about the contextual factors affecting users' behavior. ...Consequently, questions such as how users' intentions, task goals, and substances of the users' tasks affect search behavior, as well as what triggers information needs, remain largely unanswered. We report an experiment in which naturalistic information search behavior was captured by analyzing 24/7 continuous recordings of information on participants' computer screens. Written task diaries describing the participants' tasks were collected and used as real‐life task contexts for further categorization. All search tasks were extracted and classified under various task categories according to users' intentions, task goals, and substances of the tasks. We investigated the effect of different task categories on three behavioral factors: search efforts, content‐triggers, and application context. Our results suggest four findings: (i) Search activity is integrally associated with the users' creative processes. The content users have seen prior to searching more often triggers search, and is used as a query, within creative tasks. (ii) Searching within intellectual and creative tasks is more time‐intensive, while search activity occurring as a part of daily routine tasks is associated with more frequent searching within a search task. (iii) Searching is more often induced from utility applications in tasks demanding a degree of intellectual effort. (iv) Users' leisure information‐seeking activity is occurring inherently within social media services or comes from social communication platforms. The implications of our findings for information access and management systems are discussed.
Information searching in practice seldom is an end in itself. In work, work task (WT) performance forms the context, which information searching should serve. Therefore, information retrieval (IR) ...systems development/evaluation should take the WT context into account. The present paper analyzes how WT features: task complexity and task types, affect information searching in authentic work: the types of information needs, search processes, and search media. We collected data on 22 information professionals in authentic work situations in three organization types: city administration, universities, and companies. The data comprise 286 WTs and 420 search tasks (STs). The data include transaction logs, video recordings, daily questionnaires, interviews. and observation. The data were analyzed quantitatively. Even if the participants used a range of search media, most STs were simple throughout the data, and up to 42% of WTs did not include searching. WT's effects on STs are not straightforward: different WT types react differently to WT complexity. Due to the simplicity of authentic searching, the WT/ST types in interactive IR experiments should be reconsidered.
Purpose
The purpose of this paper is to investigate information retrieval (IR) in the context of authentic work tasks (WTs), as compared to traditional experimental IR study designs.
...Design/methodology/approach
The participants were 22 professionals working in municipal administration, university research and education, and commercial companies. The data comprise 286 WTs and 420 search tasks (STs). The data were collected in natural situations. It includes transaction logs, video recordings, interviews, observation, and daily questionnaires.
Findings
The analysis included the effects of WT type and complexity on the number of STs, queries, search keys and types of queries. The findings suggest that simple STs are enough to support most WTs. Complex WTs (vs more simple ones) and intellectual WTs (vs communication, support and editing WTs) include more STs than other WT categories.
Research limitations/implications
Further research should address the problems related to controllability of field studies and enhance the use of realistic WT situations in test-based studies, as well.
Originality/value
The study is an attempt to bring traditional IR studies and realistic research settings closer to each other. Using authentic WTs when studying IR is still rare. The representativeness of the WT/ST types used in interactive IR experiments should be carefully addressed: in the work flow, people seldom consciously recognise separate “STs”. This means that STs may mainly be an academic construct even to the point that studying IR without a decent context does violence to the further understanding of the phenomenon.
The aim of the study was to test whether query expansion by approximate string matching methods is beneficial in retrieval from historical newspaper collections in a language rich with compounds and ...inflectional forms (Finnish). First, approximate string matching methods were used to generate lists of index words most similar to contemporary query terms in a digitized newspaper collection from the 1800s. Top index word variants were categorized to estimate the appropriate query expansion ranges in the retrieval test. Second, the effectiveness of approximate string matching methods, automatically generated inflectional forms, and their combinations were measured in a Cranfield‐style test. Finally, a detailed topic‐level analysis of test results was conducted. In the index of historical newspaper collection the occurrences of a word typically spread to many linguistic and historical variants along with optical character recognition (OCR) errors. All query expansion methods improved the baseline results. Extensive expansion of around 30 variants for each query word was required to achieve the highest performance improvement. Query expansion based on approximate string matching was superior to using the inflectional forms of the query words, showing that coverage of the different types of variation is more important than precision in handling one type of variation.
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