How adding a sticky “my cart” button when a user begins a donation affects conversion rates
Experiment ID: #129366
Save the Children
Experiment Summary
Timeframe: 06/22/2021 - 09/27/2022
Added a sticky cart button that appears when users add an item to their cart (scroll persistent).
Research Question
We believe that adding a sticky cart button for donors who add an item to their cart (scroll persistent), will achieve a greater number of donor conversions.
Design
C: Cart button at top of page
Array
(
[0] => Array
(
[ID] => 57960
[id] => 57960
[title] => Cart_button_at_top_of_page.png
[filename] => Cart_button_at_top_of_page-2.png
[filesize] => 873894
[url] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2.png
[link] => https://www.nextafter.com/experiments/how-a-sticky-my-cart-button-that-populates-when-a-user-begins-a-donation/attachment/cart_button_at_top_of_page-png-13/
[alt] =>
[author] => 0
[description] =>
[caption] =>
[name] => cart_button_at_top_of_page-png-13
[status] => inherit
[uploaded_to] => 50096
[date] => 2024-02-09 03:22:27
[modified] => 2024-02-09 03:22:27
[menu_order] => 0
[mime_type] => image/png
[type] => image
[subtype] => png
[icon] => https://nextafter-1a91a.kxcdn.com/wp-includes/images/media/default.png
[width] => 950
[height] => 1302
[sizes] => Array
(
[thumbnail] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-150x150.png
[thumbnail-width] => 150
[thumbnail-height] => 150
[medium] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-219x300.png
[medium-width] => 219
[medium-height] => 300
[medium_large] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-768x1053.png
[medium_large-width] => 640
[medium_large-height] => 878
[large] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-747x1024.png
[large-width] => 640
[large-height] => 877
[1536x1536] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2.png
[1536x1536-width] => 950
[1536x1536-height] => 1302
[2048x2048] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2.png
[2048x2048-width] => 950
[2048x2048-height] => 1302
[ab-block-post-grid-landscape] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-600x400.png
[ab-block-post-grid-landscape-width] => 600
[ab-block-post-grid-landscape-height] => 400
[ab-block-post-grid-square] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-600x600.png
[ab-block-post-grid-square-width] => 600
[ab-block-post-grid-square-height] => 600
[tp-image-grid] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2.png
[tp-image-grid-width] => 511
[tp-image-grid-height] => 700
[post-thumbnail] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-150x150.png
[post-thumbnail-width] => 150
[post-thumbnail-height] => 150
[admin] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-36x50.png
[admin-width] => 36
[admin-height] => 50
[full] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2.png
[full-width] => 950
[full-height] => 1302
[thumb_372] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-372x510.png
[thumb_372-width] => 372
[thumb_372-height] => 510
[single_post_thumbnail] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-456x625.png
[single_post_thumbnail-width] => 456
[single_post_thumbnail-height] => 625
[thumb_32_32] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-23x32.png
[thumb_32_32-width] => 23
[thumb_32_32-height] => 32
[thumb_48_48] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-35x48.png
[thumb_48_48-width] => 35
[thumb_48_48-height] => 48
[thumb_64_64] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-47x64.png
[thumb_64_64-width] => 47
[thumb_64_64-height] => 64
[thumb_128_128] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-93x128.png
[thumb_128_128-width] => 93
[thumb_128_128-height] => 128
[thumb_122_67] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-49x67.png
[thumb_122_67-width] => 49
[thumb_122_67-height] => 67
[thumb_153_153] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-112x153.png
[thumb_153_153-width] => 112
[thumb_153_153-height] => 153
[thumb_130_163] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-119x163.png
[thumb_130_163-width] => 119
[thumb_130_163-height] => 163
[thumb_232_177] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-129x177.png
[thumb_232_177-width] => 129
[thumb_232_177-height] => 177
[thumb_272_325] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-474x650.png
[thumb_272_325-width] => 474
[thumb_272_325-height] => 650
[thumb_271_346] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-252x346.png
[thumb_271_346-width] => 252
[thumb_271_346-height] => 346
[thumb_271_271] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-198x271.png
[thumb_271_271-width] => 198
[thumb_271_271-height] => 271
[thumb_272_172] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-125x172.png
[thumb_272_172-width] => 125
[thumb_272_172-height] => 172
[thumb_372_461] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-336x461.png
[thumb_372_461-width] => 336
[thumb_372_461-height] => 461
[thumb_372_500] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-365x500.png
[thumb_372_500-width] => 365
[thumb_372_500-height] => 500
[thumb_385_270] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-197x270.png
[thumb_385_270-width] => 197
[thumb_385_270-height] => 270
[thumb_416_241] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-176x241.png
[thumb_416_241-width] => 176
[thumb_416_241-height] => 241
[thumb_448_410] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-299x410.png
[thumb_448_410-width] => 299
[thumb_448_410-height] => 410
[thumb_448_410_retina] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-598x820.png
[thumb_448_410_retina-width] => 598
[thumb_448_410_retina-height] => 820
[thumb_574_382] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-279x382.png
[thumb_574_382-width] => 279
[thumb_574_382-height] => 382
[thumb_776_395] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-288x395.png
[thumb_776_395-width] => 288
[thumb_776_395-height] => 395
[gform-image-choice-sm] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2.png
[gform-image-choice-sm-width] => 219
[gform-image-choice-sm-height] => 300
[gform-image-choice-md] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2.png
[gform-image-choice-md-width] => 292
[gform-image-choice-md-height] => 400
[gform-image-choice-lg] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2.png
[gform-image-choice-lg-width] => 438
[gform-image-choice-lg-height] => 600
)
)
[1] => Array
(
[ID] => 57963
[id] => 57963
[title] => Sticky_cart_button.png
[filename] => Sticky_cart_button-2.png
[filesize] => 1564752
[url] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2.png
[link] => https://www.nextafter.com/experiments/how-a-sticky-my-cart-button-that-populates-when-a-user-begins-a-donation/attachment/sticky_cart_button-png-13/
[alt] =>
[author] => 0
[description] =>
[caption] =>
[name] => sticky_cart_button-png-13
[status] => inherit
[uploaded_to] => 50096
[date] => 2024-02-09 03:22:49
[modified] => 2024-02-09 03:22:49
[menu_order] => 0
[mime_type] => image/png
[type] => image
[subtype] => png
[icon] => https://nextafter-1a91a.kxcdn.com/wp-includes/images/media/default.png
[width] => 890
[height] => 1304
[sizes] => Array
(
[thumbnail] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-150x150.png
[thumbnail-width] => 150
[thumbnail-height] => 150
[medium] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-205x300.png
[medium-width] => 205
[medium-height] => 300
[medium_large] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-768x1125.png
[medium_large-width] => 640
[medium_large-height] => 938
[large] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-699x1024.png
[large-width] => 640
[large-height] => 938
[1536x1536] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2.png
[1536x1536-width] => 890
[1536x1536-height] => 1304
[2048x2048] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2.png
[2048x2048-width] => 890
[2048x2048-height] => 1304
[ab-block-post-grid-landscape] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-600x400.png
[ab-block-post-grid-landscape-width] => 600
[ab-block-post-grid-landscape-height] => 400
[ab-block-post-grid-square] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-600x600.png
[ab-block-post-grid-square-width] => 600
[ab-block-post-grid-square-height] => 600
[tp-image-grid] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2.png
[tp-image-grid-width] => 478
[tp-image-grid-height] => 700
[post-thumbnail] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-150x150.png
[post-thumbnail-width] => 150
[post-thumbnail-height] => 150
[admin] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-34x50.png
[admin-width] => 34
[admin-height] => 50
[full] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2.png
[full-width] => 890
[full-height] => 1304
[thumb_372] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-372x545.png
[thumb_372-width] => 372
[thumb_372-height] => 545
[single_post_thumbnail] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-427x625.png
[single_post_thumbnail-width] => 427
[single_post_thumbnail-height] => 625
[thumb_32_32] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-22x32.png
[thumb_32_32-width] => 22
[thumb_32_32-height] => 32
[thumb_48_48] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-33x48.png
[thumb_48_48-width] => 33
[thumb_48_48-height] => 48
[thumb_64_64] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-44x64.png
[thumb_64_64-width] => 44
[thumb_64_64-height] => 64
[thumb_128_128] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-87x128.png
[thumb_128_128-width] => 87
[thumb_128_128-height] => 128
[thumb_122_67] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-46x67.png
[thumb_122_67-width] => 46
[thumb_122_67-height] => 67
[thumb_153_153] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-104x153.png
[thumb_153_153-width] => 104
[thumb_153_153-height] => 153
[thumb_130_163] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-111x163.png
[thumb_130_163-width] => 111
[thumb_130_163-height] => 163
[thumb_232_177] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-121x177.png
[thumb_232_177-width] => 121
[thumb_232_177-height] => 177
[thumb_272_325] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-444x650.png
[thumb_272_325-width] => 444
[thumb_272_325-height] => 650
[thumb_271_346] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-236x346.png
[thumb_271_346-width] => 236
[thumb_271_346-height] => 346
[thumb_271_271] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-185x271.png
[thumb_271_271-width] => 185
[thumb_271_271-height] => 271
[thumb_272_172] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-117x172.png
[thumb_272_172-width] => 117
[thumb_272_172-height] => 172
[thumb_372_461] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-315x461.png
[thumb_372_461-width] => 315
[thumb_372_461-height] => 461
[thumb_372_500] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-341x500.png
[thumb_372_500-width] => 341
[thumb_372_500-height] => 500
[thumb_385_270] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-184x270.png
[thumb_385_270-width] => 184
[thumb_385_270-height] => 270
[thumb_416_241] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-164x241.png
[thumb_416_241-width] => 164
[thumb_416_241-height] => 241
[thumb_448_410] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-280x410.png
[thumb_448_410-width] => 280
[thumb_448_410-height] => 410
[thumb_448_410_retina] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-560x820.png
[thumb_448_410_retina-width] => 560
[thumb_448_410_retina-height] => 820
[thumb_574_382] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-261x382.png
[thumb_574_382-width] => 261
[thumb_574_382-height] => 382
[thumb_776_395] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-270x395.png
[thumb_776_395-width] => 270
[thumb_776_395-height] => 395
[gform-image-choice-sm] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2.png
[gform-image-choice-sm-width] => 205
[gform-image-choice-sm-height] => 300
[gform-image-choice-md] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2.png
[gform-image-choice-md-width] => 273
[gform-image-choice-md-height] => 400
[gform-image-choice-lg] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2.png
[gform-image-choice-lg-width] => 410
[gform-image-choice-lg-height] => 600
)
)
)
T1: Sticky cart button
Array
(
[0] => Array
(
[ID] => 57960
[id] => 57960
[title] => Cart_button_at_top_of_page.png
[filename] => Cart_button_at_top_of_page-2.png
[filesize] => 873894
[url] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2.png
[link] => https://www.nextafter.com/experiments/how-a-sticky-my-cart-button-that-populates-when-a-user-begins-a-donation/attachment/cart_button_at_top_of_page-png-13/
[alt] =>
[author] => 0
[description] =>
[caption] =>
[name] => cart_button_at_top_of_page-png-13
[status] => inherit
[uploaded_to] => 50096
[date] => 2024-02-09 03:22:27
[modified] => 2024-02-09 03:22:27
[menu_order] => 0
[mime_type] => image/png
[type] => image
[subtype] => png
[icon] => https://nextafter-1a91a.kxcdn.com/wp-includes/images/media/default.png
[width] => 950
[height] => 1302
[sizes] => Array
(
[thumbnail] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-150x150.png
[thumbnail-width] => 150
[thumbnail-height] => 150
[medium] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-219x300.png
[medium-width] => 219
[medium-height] => 300
[medium_large] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-768x1053.png
[medium_large-width] => 640
[medium_large-height] => 878
[large] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-747x1024.png
[large-width] => 640
[large-height] => 877
[1536x1536] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2.png
[1536x1536-width] => 950
[1536x1536-height] => 1302
[2048x2048] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2.png
[2048x2048-width] => 950
[2048x2048-height] => 1302
[ab-block-post-grid-landscape] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-600x400.png
[ab-block-post-grid-landscape-width] => 600
[ab-block-post-grid-landscape-height] => 400
[ab-block-post-grid-square] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-600x600.png
[ab-block-post-grid-square-width] => 600
[ab-block-post-grid-square-height] => 600
[tp-image-grid] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2.png
[tp-image-grid-width] => 511
[tp-image-grid-height] => 700
[post-thumbnail] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-150x150.png
[post-thumbnail-width] => 150
[post-thumbnail-height] => 150
[admin] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-36x50.png
[admin-width] => 36
[admin-height] => 50
[full] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2.png
[full-width] => 950
[full-height] => 1302
[thumb_372] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-372x510.png
[thumb_372-width] => 372
[thumb_372-height] => 510
[single_post_thumbnail] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-456x625.png
[single_post_thumbnail-width] => 456
[single_post_thumbnail-height] => 625
[thumb_32_32] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-23x32.png
[thumb_32_32-width] => 23
[thumb_32_32-height] => 32
[thumb_48_48] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-35x48.png
[thumb_48_48-width] => 35
[thumb_48_48-height] => 48
[thumb_64_64] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-47x64.png
[thumb_64_64-width] => 47
[thumb_64_64-height] => 64
[thumb_128_128] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-93x128.png
[thumb_128_128-width] => 93
[thumb_128_128-height] => 128
[thumb_122_67] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-49x67.png
[thumb_122_67-width] => 49
[thumb_122_67-height] => 67
[thumb_153_153] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-112x153.png
[thumb_153_153-width] => 112
[thumb_153_153-height] => 153
[thumb_130_163] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-119x163.png
[thumb_130_163-width] => 119
[thumb_130_163-height] => 163
[thumb_232_177] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-129x177.png
[thumb_232_177-width] => 129
[thumb_232_177-height] => 177
[thumb_272_325] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-474x650.png
[thumb_272_325-width] => 474
[thumb_272_325-height] => 650
[thumb_271_346] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-252x346.png
[thumb_271_346-width] => 252
[thumb_271_346-height] => 346
[thumb_271_271] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-198x271.png
[thumb_271_271-width] => 198
[thumb_271_271-height] => 271
[thumb_272_172] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-125x172.png
[thumb_272_172-width] => 125
[thumb_272_172-height] => 172
[thumb_372_461] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-336x461.png
[thumb_372_461-width] => 336
[thumb_372_461-height] => 461
[thumb_372_500] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-365x500.png
[thumb_372_500-width] => 365
[thumb_372_500-height] => 500
[thumb_385_270] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-197x270.png
[thumb_385_270-width] => 197
[thumb_385_270-height] => 270
[thumb_416_241] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-176x241.png
[thumb_416_241-width] => 176
[thumb_416_241-height] => 241
[thumb_448_410] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-299x410.png
[thumb_448_410-width] => 299
[thumb_448_410-height] => 410
[thumb_448_410_retina] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-598x820.png
[thumb_448_410_retina-width] => 598
[thumb_448_410_retina-height] => 820
[thumb_574_382] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-279x382.png
[thumb_574_382-width] => 279
[thumb_574_382-height] => 382
[thumb_776_395] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2-288x395.png
[thumb_776_395-width] => 288
[thumb_776_395-height] => 395
[gform-image-choice-sm] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2.png
[gform-image-choice-sm-width] => 219
[gform-image-choice-sm-height] => 300
[gform-image-choice-md] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2.png
[gform-image-choice-md-width] => 292
[gform-image-choice-md-height] => 400
[gform-image-choice-lg] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Cart_button_at_top_of_page-2.png
[gform-image-choice-lg-width] => 438
[gform-image-choice-lg-height] => 600
)
)
[1] => Array
(
[ID] => 57963
[id] => 57963
[title] => Sticky_cart_button.png
[filename] => Sticky_cart_button-2.png
[filesize] => 1564752
[url] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2.png
[link] => https://www.nextafter.com/experiments/how-a-sticky-my-cart-button-that-populates-when-a-user-begins-a-donation/attachment/sticky_cart_button-png-13/
[alt] =>
[author] => 0
[description] =>
[caption] =>
[name] => sticky_cart_button-png-13
[status] => inherit
[uploaded_to] => 50096
[date] => 2024-02-09 03:22:49
[modified] => 2024-02-09 03:22:49
[menu_order] => 0
[mime_type] => image/png
[type] => image
[subtype] => png
[icon] => https://nextafter-1a91a.kxcdn.com/wp-includes/images/media/default.png
[width] => 890
[height] => 1304
[sizes] => Array
(
[thumbnail] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-150x150.png
[thumbnail-width] => 150
[thumbnail-height] => 150
[medium] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-205x300.png
[medium-width] => 205
[medium-height] => 300
[medium_large] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-768x1125.png
[medium_large-width] => 640
[medium_large-height] => 938
[large] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-699x1024.png
[large-width] => 640
[large-height] => 938
[1536x1536] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2.png
[1536x1536-width] => 890
[1536x1536-height] => 1304
[2048x2048] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2.png
[2048x2048-width] => 890
[2048x2048-height] => 1304
[ab-block-post-grid-landscape] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-600x400.png
[ab-block-post-grid-landscape-width] => 600
[ab-block-post-grid-landscape-height] => 400
[ab-block-post-grid-square] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-600x600.png
[ab-block-post-grid-square-width] => 600
[ab-block-post-grid-square-height] => 600
[tp-image-grid] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2.png
[tp-image-grid-width] => 478
[tp-image-grid-height] => 700
[post-thumbnail] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-150x150.png
[post-thumbnail-width] => 150
[post-thumbnail-height] => 150
[admin] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-34x50.png
[admin-width] => 34
[admin-height] => 50
[full] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2.png
[full-width] => 890
[full-height] => 1304
[thumb_372] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-372x545.png
[thumb_372-width] => 372
[thumb_372-height] => 545
[single_post_thumbnail] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-427x625.png
[single_post_thumbnail-width] => 427
[single_post_thumbnail-height] => 625
[thumb_32_32] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-22x32.png
[thumb_32_32-width] => 22
[thumb_32_32-height] => 32
[thumb_48_48] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-33x48.png
[thumb_48_48-width] => 33
[thumb_48_48-height] => 48
[thumb_64_64] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-44x64.png
[thumb_64_64-width] => 44
[thumb_64_64-height] => 64
[thumb_128_128] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-87x128.png
[thumb_128_128-width] => 87
[thumb_128_128-height] => 128
[thumb_122_67] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-46x67.png
[thumb_122_67-width] => 46
[thumb_122_67-height] => 67
[thumb_153_153] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-104x153.png
[thumb_153_153-width] => 104
[thumb_153_153-height] => 153
[thumb_130_163] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-111x163.png
[thumb_130_163-width] => 111
[thumb_130_163-height] => 163
[thumb_232_177] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-121x177.png
[thumb_232_177-width] => 121
[thumb_232_177-height] => 177
[thumb_272_325] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-444x650.png
[thumb_272_325-width] => 444
[thumb_272_325-height] => 650
[thumb_271_346] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-236x346.png
[thumb_271_346-width] => 236
[thumb_271_346-height] => 346
[thumb_271_271] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-185x271.png
[thumb_271_271-width] => 185
[thumb_271_271-height] => 271
[thumb_272_172] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-117x172.png
[thumb_272_172-width] => 117
[thumb_272_172-height] => 172
[thumb_372_461] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-315x461.png
[thumb_372_461-width] => 315
[thumb_372_461-height] => 461
[thumb_372_500] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-341x500.png
[thumb_372_500-width] => 341
[thumb_372_500-height] => 500
[thumb_385_270] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-184x270.png
[thumb_385_270-width] => 184
[thumb_385_270-height] => 270
[thumb_416_241] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-164x241.png
[thumb_416_241-width] => 164
[thumb_416_241-height] => 241
[thumb_448_410] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-280x410.png
[thumb_448_410-width] => 280
[thumb_448_410-height] => 410
[thumb_448_410_retina] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-560x820.png
[thumb_448_410_retina-width] => 560
[thumb_448_410_retina-height] => 820
[thumb_574_382] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-261x382.png
[thumb_574_382-width] => 261
[thumb_574_382-height] => 382
[thumb_776_395] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2-270x395.png
[thumb_776_395-width] => 270
[thumb_776_395-height] => 395
[gform-image-choice-sm] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2.png
[gform-image-choice-sm-width] => 205
[gform-image-choice-sm-height] => 300
[gform-image-choice-md] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2.png
[gform-image-choice-md-width] => 273
[gform-image-choice-md-height] => 400
[gform-image-choice-lg] => https://nextafter-1a91a.kxcdn.com/wp-content/uploads/Sticky_cart_button-2.png
[gform-image-choice-lg-width] => 410
[gform-image-choice-lg-height] => 600
)
)
)
Results
| Treatment Name | Conv. Rate | Relative Difference | Confidence | |
|---|---|---|---|---|
| C: | Cart button at top of page | 1.4% | ||
| T1: | Sticky cart button | 1.7% | 20.2% | 89.1% |
This experiment has a required sample size of 14,234 in order to be valid. Since the experiment had a total sample size of 18,976, and the level of confidence is not above 95% the experiment results are not valid.
Key Learnings
Notable Results & Recommendations
• Mobile donor conversion was higher for the sticky cart (42%) at a statistically valid LoC (95%).
• Mobile revenue per visitor was higher for the sticky cart (68%) at a statistically valid LoC (98%).
• Recommendation is sticky cart addition to all gift catalog-related pages.
• Projected yearly incremental lift of $200,000.