terça-feira, 26 de junho de 2012

Quantifying the User Experience: Practical Statistics for User Research


Jeff Sauro, James R Lewis

Morgan Kaufmann | 2012 | 312 páginas | PDF | 5,2  Mb

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You're being asked to quantify usability improvements with statistics. But even with a background in statistics, you are hesitant to statistically analyze the data, as you may be unsure about which statistical tests to use and have trouble defending the use of the small test sample sizes associated with usability studies.
The book is about providing a practical guide on how to use statistics to solve common quantitative problems arising in user research. It addresses common questions you face every day such as: Is the current product more usable than our competition? Can we be sure at least 70% of users can complete the task on the 1st attempt? How long will it take users to purchase products on the website? This book shows you which test to use, and how provide a foundation for both the statistical theory and best practices in applying them. The authors draw on decades of statistical literature from Human Factors, Industrial Engineering and Psychology, as well as their own published research to provide the best solutions. They provide both concrete solutions (excel formula, links to their own web-calculators) along with an engaging discussion about the statistical reasons for why the tests work, and how to effectively communicate the results.
    *Provides practical guidance on solving usability testing problems with statistics for any project, including those using Six Sigma practices
      *Show practitioners which test to use, why they work, best practices in application, along with easy-to-use excel formulas and web-calculators for analyzing data
        *Recommends ways for practitioners to communicate results to stakeholders in plain English

        Navigating through Data Analysis and Probability in Prekindergarten-Grade 2


        Linda Jensen Sheffield, Mary Cavanagh, Linda Dacey, Carol R. Findell, Carole Greenes, and Marian Small

        National Council of Teachers of Mathematics |  2002  | 100 páginas | PDF | 2,9 Mb

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        This book demonstrates how some fundamental ideas about data analysis and probability can be introduced to build a strong foundation in young students. Activities designed to introduce and promote familiarity with essential concepts develop and extend students' ideas about data analysis and simple probability through the use of bar graphs, tallies, frequency tables, and Venn diagrams. Helpful margin notes provide teaching tips, anticipated student responses to questions, samples of students' work, and ways to modify the activities for students experiencing difficulty or needing enrichment. The supplemental CD-ROM features interactive electronic activities, master copies of activity pages for students, and additional readings for teachers.

        Índice

        Table of Contents
        About This Book  . vii
        Introduction . 1 (falta)
        Chapter 1 - Data Collection, Organization, and Display . 11
        Build a Graph . 15
        What’s Your Favorite?  . 18
        Junk Sort  . 22
        All about Shoes  . 25
        Chain It . 27
        Families. 30
        Row Your Boat  . 33
        Morley Most and Lutie Least  . 36
        Chapter 2 - Question Posing and Data Analysis .  41 (falta)
        Back and Forth . 44 (falta)
        Mystery Graphs . 50
        Conducting a Survey . 53 (falta)
        What a Difference a Day Makes . 55
        Whom Do You Believe? . 58
        Travel Agent . 61 (falta)
        Chapter 3 - Probability . 63 (falta)
        Possible or Impossible . 65
        Spin It . 67
        Which Bag Is Which?  . 70
        Some Sums . 73 (falta)
        Looking Back and Looking Ahead . 77 (falta)
        Appendix - Blackline Masters and Solutions  . 79 (falta)
        Vertical Graph Mat . 80
        Horizontal Graph Mat . 81
        Mary Had a Little Lamb . 82
        Mystery Graphs . 83
        Which Is Which? . 84
        More than One Story. 85
        Our Survey . 86
        About Students . 87
        More about Students  . 88
        Favorite Colors  . 89
        Children in a Class . 90
        Class Trip . 91 (falta)
        Spin It  . 93
        Color Predictions  . 95
        Color Splits  . 96
        Solutions  . 97 (falta)
        References  . 98 (falta)

        Introduction
        Table of Standards and Expectations, Data Analysis and Probability, Pre-K–12 (faltam)
        Applet Activities
        Get Organized
        Shape Sorter
        Guess the Rule
        Make the Rule
        Probability Games
        Preset Spinner
        Make Your Own Spinner
        Dice Sums
        Blackline Masters and Templates (faltam)
        Blackline Masters
        Ages of Students
        Number of Students’ Pets
        Number of Students’ Siblings
        Students’ Favorite Sport
        One-Half-Inch Grid Paper
        One-Inch Grid Paper
        Two-Centimeter Grid Paper

        Readings from Publications of the National Council of Teachers of Mathematics
        Collecting Data Outdoors: Making Connections to the Real World
        Carole Basile
        Teaching Children Mathematics

        Describes a process of data collection with young children using the outdoors as a mathematical context. The process of data collection and processing introduces children to more abstract mathematics as they sort and classify data, create graphs, compare datasets, examine patterns, and interpret graphical representations.

         
        Exploring Data: Kindergarten Children Do It Their Way
        Frances R. Curcio e Susan Folkson
        Teaching Children Mathematics

        Describes situations in which children developed mathematical concepts through processes of sorting and classifying, comparing, measuring, matching with one-to-one correspondence, and enumerating. Data were gathered while observing informal discourse, during sharing sessions, and in a reading session.
        Young Students Investigate Number Cubes
        Alex Friedlander
        Teaching Children Mathematics

        Describes a series of learning activities built around number cubes. Sample activities introduce elementary properties of the cube, the magic rule of seven, and basic concepts related to graphs in the plane coordinate system.

        Making Sense of Graphs: Critical Factors Influencing Comprehension and Instructional Implications
        Susan N. Friel, Frances R. Curcio, e George W. Bright
        Journal for Research in Mathematics Education

        This article outlines critical factors that appear to influence graph comprehension and identifies instructional implications. The factors identified are purpose, task characteristics, discipline characteristics and reader characteristics. A sequence for ordering the introduction of graphs is proposed and ways instruction may be modified to promote graph sense making.


        Pictures, Tables, Graphs, and Questions: Statistical Processes
        Andrew C. Isaacs e Catherine Randall Kelso
        Teaching Children Mathematics

        Outlines an approach to the problem of over- or underquantification for students by teaching science as a process of collecting, organizing, and analyzing data that naturally integrates with mathematics. 
        Students’ Probabilistic Thinking in Instruction 
        Graham A. Jones, Cynthia W. Langrall, Carol A. Thornton, e A. Timothy Mogill
        Journal for Research in Mathematics Education

        Evaluates the thinking of third grade students in relation to an instructional program in probability which was informed by a research-based framework that included a description of students' probabilistic thinking. Reveals that overcoming misconceptions in sample space, applying both part-part and part-whole reasoning, and using invented language to describe probabilities were key patterns in producing growth in probabilistic thinking.

        Hamster Math: Authentic Experiences in Data Collection
        Beth Jorgensen
        Teaching Children Mathematics

        Describes the data collection and interpretation project of primary grade students involving predicting, graphing, estimating, measuring, number problem construction, problem solving, and probability.

        Classification and Logical Reasoning 
        Melfried Olson e Judith Olson
        Teaching Children Mathematics

        These activities explore classification and logical reasoning by providing students with opportunities to generate multiple answers and engage in multiple classifications of the same item. No solutions are suggested so that students will look to themselves as the mathematical authorities. Sample items for classification include birthday months, toys, holidays, and geometric figures. Numbers are classified by skip counting and factoring.

        The Shape of Fairness 
        Elizabeth Penner e Richard Lehrer
        Teaching Children Mathematics

        Describes how young children used geometric shapes to model a fair playing space for "Mother, may I?"

        Take Two: Fair or Unfair? 
        Lynae Sakshaug
        Teaching Children Mathematics

        Problem Solvers poses a problem for classroom use and gives a solution to a previously published problem.

        Responses to the Take Two: Fair or Unfair? Problem
        Lynae Sakshaug
        Teaching Children Mathematics

        Presents answers to the problem appearing in the January, 1999 Problem Solvers section of this journal, which was a strategy game called "Take Two" in which two players played by placing seven chips in a row and removing one or two chips each turn.

        Which Graph Is Which?
        Lynae Sakshaug
        Teaching Children Mathematics

        Introduces a problem that can be used to help children develop graph sense. Involves two graphs of which students must determine which one applies to which situation.

        Young Children Deal with Data 
        Judith V. Taylor
        Teaching Children Mathematics

        Presents activities having to do with data generation, organization, interpretation, representation, drawing conclusions, and making predictions on the basis of data which students have collected. 

        The Place of Probability in Science: In Honor of Ellery Eells (1953-2006)




        Ellery Eells, J.H. Fetzer

        Springer | 2010| 368 páginas | PDF | 3 Mb


        The purpose of philosophy, broadly conceived, can be described as that of attempting to resolve heretofore unsolved conceptual and theoretical problems, especially those that lie at the foundations of knowledge and values. Given the central role of science in acquiring reliable knowledge, the study of science has become of special importance within philosophy. And within philosophy of science, in turn, no other concept possesses the centrality and importance as does that of probability. To clarify and illuminate the place of probability in science Ellery Eells and James H. Fetzer have brought together some of the most distinguished philosophers from our time.
        After a comprehensive introduction to alternative conceptions of objective probability and the difficulties that they confront, three studies describe the special problems that arise within this context and the comparative merits of different accounts. The second section addresses the nature of lawfulness and of relations between micro- and macro-probabilities, especially with reference to the concept of fitness in evolution. The third section confronts some of the difficulties confronted by causal conceptions of probability, especially within the quantum domain. The fourth extends the discussion to principles of inference and decision. The last chapter relates propensities and frequencies to the framework of inference to the best explanation.