Blog

Published research re-submitted by fake but less prestigious authors is rejected

I wasn't aware of this 1982 article[fusion_builder_container hundred_percent="yes" overflow="visible"][fusion_builder_row][fusion_builder_column type="1_1" background_position="left top" background_color="" border_size="" border_color="" border_style="solid" spacing="yes" background_image="" background_repeat="no-repeat" padding="" margin_top="0px" margin_bottom="0px" class="" id="" animation_type="" animation_speed="0.3" animation_direction="left" hide_on_mobile="no" center_content="no" min_height="none"][1. Douglas P. Peters and Stephen J. Ceci (1982). Peer-review practices of psychological journals: The fate of published articles, submitted again....

100 psychology studies replicated: 50%+ lose their results (research weaknesses watch)

A great academic effort published in this month's Science issue (link). Abstract: Reproducibility is a defining feature of science, but the extent to which it characterizes current research is unknown. We conducted replications of 100 experimental and correlational studies published in three psychology journals using high-powered designs and original materials when...

Including scientific charts and data improves persuasiveness

According to a new research study[fusion_builder_container hundred_percent="yes" overflow="visible"][fusion_builder_row][fusion_builder_column type="1_1" background_position="left top" background_color="" border_size="" border_color="" border_style="solid" spacing="yes" background_image="" background_repeat="no-repeat" padding="" margin_top="0px" margin_bottom="0px" class="" id="" animation_type="" animation_speed="0.3" animation_direction="left" hide_on_mobile="no" center_content="no" min_height="none"][1. Tal, A., & Wansink, B. (2014). Blinded with science: Trivial graphs and formulas increase ad persuasiveness and belief in product efficacy. Public...

How long to run an A/B test for?

One of the most common source of false results when doing A/B testing is to stop your tests too early or in the middle of a business cycle. If you do that, your results will most likely be off, sometimes by a small margin, sometimes by an order of magnitude....

The maths behind the minimum sample size in A/B testing

[fusion_builder_container hundred_percent="yes" overflow="visible"][fusion_builder_row][fusion_builder_column type="1_1" background_position="left top" background_color="" border_size="" border_color="" border_style="solid" spacing="yes" background_image="" background_repeat="no-repeat" padding="" margin_top="0px" margin_bottom="0px" class="" id="" animation_type="" animation_speed="0.3" animation_direction="left" hide_on_mobile="no" center_content="no" min_height="none"][latexpage] This post explains in detail the parameters and maths behind the online calculators available on this website: the A/B testing strategy planning calculator and the A/B...

How to best use the Optimizely free plan (Starter)?

[fusion_builder_container hundred_percent="yes" overflow="visible"][fusion_builder_row][fusion_builder_column type="1_1" background_position="left top" background_color="" border_size="" border_color="" border_style="solid" spacing="yes" background_image="" background_repeat="no-repeat" padding="" margin_top="0px" margin_bottom="0px" class="" id="" animation_type="" animation_speed="0.3" animation_direction="left" hide_on_mobile="no" center_content="no" min_height="none"][fusion_alert type="general" accent_color="" background_color="" border_size="1px" icon="fa-refresh" box_shadow="yes" animation_type="0" animation_direction="down" animation_speed="0.1" class="" id=""]Last updated: November 24, 2014.[/fusion_alert] Optimizely new Free plan: 50,000 unique visitors a month included Optimizely...