Experiment To Test Quality Assessment In Complex Task /...

\chapter{Experiment to Test Quality Assessment in Complex Task/Workflow} \section{Overview} \label{sec:introduction} This work focus on test the aggregation model and compare different algorithms, hence the experiments will take existing workflows by applying different algorithms. As stated in Section \ref{sec:model_aggregation}, we will start with three popular algorithms and apply them in different datasets generated by different workflows. Previous research has proposed a range of methods to infer and predict the quality of crowd answers \citep{Bachrach,dawid1979maximum,Difallah2015,HareAWSSDL13,Ipeirotis2010,Karger2011,Loni2014,Paulheim,QuocVietHung2013,Rosenthal2010a,Simpson2013,Whitehill2009}. Whilst all methods have their†¦show more content†¦We firstly evaluate the overall approach on two datasets with different workflows: one from Snapshot Serengeti\textsuperscript{\ref{sg_link}}, which is based on an iterative workflow where each iteration consists of several independent questions; and a second one from the Cities at Night project\footnote{\url{http://citiesatnight.org/}\label{ds_link}}, which uses microtask crowdsourcing to analyse night-time photographs taken by astronauts onboard the ISS via a workflow in which questions and answers are arranged in a decision tree. Then we also replicate the existing workflows from citizen science classification projects and evaluate the quality in a paid crowdsourci ng environment using the proposed aggregation strategy. For the later experiment, We used a more complex workflow from GalaxyZoo project where several different questions were asked in sequence depending on the answers to previous questions and can involve maximum nine classification questions. \begin{figure} \centering \includegraphics[width=0.6\textwidth]{serengeti_example_annotations_smooth.png} \caption{Example classification paths collected from $20$ workers for a given photo. The crowd is asked to choose the animal type and estimate how many animals are in the picture. Wider arrows indicate paths that are popular with the crowd.} \label{fig:serengeti_example} \end{figure} The experimentsShow MoreRelatedWhat Are the Effects of Adhd in the Classroom?5060 Words   |  21 PagesAEN Module Essay on an area of educational need: ADHD. Attention deficit hyperactivity disorder (ADHD) is one of the most common and most distressing disorders amongst school-age children, yet it is probably one of the least well understood. 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