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Who wrote History of Progress Bar?
Daniel Engber
Why progress bars in 70s/80s?
Computers slow/unreliable; users didn't know if crashed
Bob Stahl's view?
Waiting frustration is about user feelings, not just time
Brad A. Myers research year?
1985 conference on computer-human interactions
Myers study participants?
48 students doing database searches
Myers study result?
86% liked progress bars even if inaccurate
Myers current position?
Faculty at Carnegie Mellon University
Horizontal progress bar origin?
1985 Myers study: left-to-right filling capsule
Chris Harrison contribution?
Animated effects make bars seem faster
Progress bar evolution from?
Early 20th century pen-and-paper charts
Walter Polakov beliefs?
Marxist; progress charts humane, balance work/life
Indeterminate progress bar use?
When task duration unknown
Indeterminate bar example?
Spinning wheels (YouTube loading)
Splash screen purpose?
Show program loading with logo/version
Splash screen location?
Full screen or center rectangle
Console output common in?
Command line, developer tools, install logs
Skeleton screen types?
Static-content, animated, frame-display
Skeleton screen benefit?
Builds mental model of page layout
Throbber first use?
NCSA Mosaic browser (1990s) with logo animation
Placebo button definition?
Button appears functional but does nothing
Elevator close door buttons?
Many disconnected since 1990s
Crosswalk button status?
2500/3250 NYC buttons are mechanical placebos
Thermostat placebo purpose?
Reduce employee complaints about temperature
Houston airport baggage fix?
Moved gates farther; complaints dropped
Richard Larson queuing stat?
People overestimate wait by 36%
Mirror by elevators reason?
Occupy time during post-WWII skyscraper delays
Disney wait time tactic?
Overestimates so guests pleasantly surprised
Endowed progress effect study?
Nunes & Dreze punch card experiment
Punch card Group 1?
Blank 8 squares for free wash
Punch card Group 2?
10 squares with 2 pre-punched
Survey progress conditions?
Constant, fast-to-slow, slow-to-fast
Fast-to-slow breakoff rate?
11.3%
Slow-to-fast breakoff rate?
21.8%
Constant rate breakoff rate?
14.4%
Ridge Racer loading game?
Galaxian minigame (1994)
Namco patent number?
U.S. Patent 5,718,632 (expires 2015)
Chrome Dino debut?
2014 offline easter egg
Chrome Dino creators?
Edward Jung, Sebastien Gabriel, Alan Bettes
Chrome Dino monthly plays?
270 million games
Chrome Dino disable reason?
School kids/adults played instead of working
GDP components?
Consumption, gov spending, net exports, investment
GDP per capita use?
Rough measure of living standards
Nominal GDP use?
International comparisons at current exchange rates
PPP GDP adjustment?
For cost of living differences
GDP criticisms?
Ignores externalities, unpaid work, environment
Simon Kuznets role?
Developed GDP concept 1934 US Congress report
William Petty GDP origin?
1650s tax burden calculation
Bretton Woods GDP?
1944 conference standardized GDP over GNP
GNI vs GDP?
GNI = GDP + net factor income from abroad
Irish Modified GNI reason?
Multinational tax distortion of GDP
Gini coefficient range?
0 (perfect equality) to 1 (max inequality)
Corrado Gini nationality?
Italian statistician/sociologist
Gini based on?
Lorenz curve (A/(A+B) area ratio)
OECD Gini range?
0.24-0.49 after taxes/transfers
South Africa Gini?
0.63-0.70 pre-tax (highest)
HDI components?
Life expectancy, education, GNI per capita PPP
HDI creators?
Mahbub ul-Haq, Amartya Sen influence
IHDI adjustment?
Inequality-adjusted HDI
MPI developers?
Oxford Poverty & Human Development Initiative (OPHI)
Global MPI dimensions?
Health, education, standard of living
MPI deprivation threshold?
1/3 deprivation score = poor household
Labour productivity measure?
Output per hours worked/jobs/employment
OECD productivity inputs?
Hours worked, labour jobs, employment numbers
Happiness Index publisher?
World Happiness Report (Oxford/Gallup/UN)
Finland ranking?
Happiest country 8 years running (as of 2025)
Passport Index launcher?
Henley & Partners (2005)
Big Mac Index creator?
Pam Woodall, The Economist (1986)
Big Mac Index purpose?
Informal PPP exchange rate test
Second Law Thermodynamics?
Entropy increases in isolated systems
Carnot's theorem year?
1824 heat engine efficiency limit
Rudolf Clausius entropy?
1850s; heat can't flow cold→hot spontaneously
MLK quote origin?
"The arc of moral universe bends toward justice"
Theodore Parker influence?
19th century abolitionist inspired MLK quote
Joel Mokyr thesis?
Progress belief emerged 1500-1700 Europe
Royal Society motto?
Nullius in verba ("on no one's word")
Ancients vs Moderns battle?
17th century: modern science beat classical texts