Item Slam
Patch 7.41f
Bracer in patch 7.41f: WPA of the purchase on 43 heroes, by role and build slot, against the other items bought in the same slot. Best confirmed result: Techies core, 2nd lane item (+9.62 pp).
WPA of the item against the other items bought in the same slot, in matches of every rank. Slots with fewer than 30 purchases are left out.
| Hero | Role | Slot | Purchases | WPA | 95% CI | Verdict |
|---|---|---|---|---|---|---|
 Techies | Core | 2nd lane item | 30 (18.2%) | +9.62 | +2.29 to +16.72 | ✓ Better |
| Techies | Core | Lane item | 49 (15.9%) | +7.38 | +2.37 to +13.54 | ✓ Better |
 Luna | Core | 2nd lane item | 31 (1.7%) | +6.00 | −5.29 to +15.39 | Inconclusive |
| Techies | Support | 2nd lane item | 197 (3.6%) | +5.35 | +0.90 to +9.22 | ✓ Better |
 Invoker | Core | Lane item | 77 (0.5%) | +5.24 | −0.28 to +10.93 | Inconclusive |
 Witch Doctor | Support | Lane item | 141 (1.5%) | +5.16 | −1.87 to +10.55 | Inconclusive |
 Dragon Knight | Core | 4º+ | 50 (6.6%) | +4.88 | −2.54 to +13.19 | Inconclusive |
 Night Stalker | Core | 3º | 394 (17.4%) | +4.23 | +0.36 to +7.75 | Inconclusive |
 Magnus | Support | Lane item | 94 (7.4%) | +4.01 | −0.46 to +8.01 | Inconclusive |
 Lion | Support | 3º | 42 (48.8%) | +3.36 | −0.02 to +7.56 | Inconclusive |
 Hoodwink | Support | 3º | 38 (22.5%) | +2.89 | −0.63 to +6.29 | Inconclusive |
| Techies | Support | Lane item | 432 (3.2%) | +2.79 | −1.15 to +6.57 | Inconclusive |
 Shadow Shaman | Support | 2nd lane item | 67 (26.5%) | +2.63 | −1.38 to +7.70 | Inconclusive |
| Invoker | Core | 2nd lane item | 122 (0.9%) | +2.63 | −2.76 to +7.77 | Inconclusive |
| Luna | Core | Lane item | 35 (0.2%) | +2.58 | −7.63 to +10.26 | Inconclusive |
 Rubick | Core | Lane item | 38 (1.3%) | +2.50 | −3.17 to +8.31 | Inconclusive |
| Techies | Support | 3º | 35 (7.1%) | +2.46 | −1.17 to +6.60 | Inconclusive |
| Hoodwink | Support | Lane item | 105 (0.7%) | +2.40 | −4.39 to +8.66 | Inconclusive |
| Invoker | Core | 3º | 69 (1.6%) | +2.18 | −3.32 to +7.09 | Inconclusive |
| Lion | Support | 2nd lane item | 372 (36.6%) | +2.08 | −0.25 to +4.31 | Inconclusive |
 Winter Wyvern | Support | Lane item | 62 (0.5%) | +1.90 | −4.52 to +8.97 | Inconclusive |
 Anti-Mage | Core | Lane item | 553 (5.2%) | +1.75 | −1.40 to +4.87 | Inconclusive |
| Lion | Core | 2nd lane item | 171 (18.6%) | +1.68 | −2.51 to +6.75 | Inconclusive |
 Bounty Hunter | Support | Lane item | 111 (0.9%) | +1.65 | −5.34 to +7.84 | Inconclusive |
| Anti-Mage | Core | 2nd lane item | 156 (6.4%) | +1.56 | −2.51 to +6.08 | Inconclusive |
 Outworld Devourer | Core | Lane item | 369 (2.2%) | +1.53 | −2.02 to +6.01 | Inconclusive |
 Slark | Core | Lane item | 2,105 (12.3%) | +1.35 | −0.41 to +3.34 | Inconclusive |
 Wraith King | Core | 3º | 53 (22.9%) | +1.30 | −3.94 to +5.96 | Inconclusive |
| Lion | Support | Lane item | 521 (4.8%) | +1.25 | −2.14 to +4.55 | Inconclusive |
 Tidehunter | Support | Lane item | 79 (26.6%) | +1.11 | −2.34 to +4.94 | Inconclusive |
 Earthshaker | Core | 2nd lane item | 480 (12.5%) | +1.09 | −1.57 to +4.80 | Inconclusive |
 Windranger | Core | 2nd lane item | 2,480 (26.1%) | +1.08 | −0.22 to +2.51 | Inconclusive |
 Lich | Support | 2nd lane item | 150 (28.6%) | +1.03 | −2.60 to +5.40 | Inconclusive |
| Night Stalker | Support | Lane item | 34 (36.2%) | +0.90 | −2.37 to +4.35 | Inconclusive |
| Windranger | Core | Lane item | 2,201 (19.2%) | +0.88 | −0.86 to +2.56 | Inconclusive |
| Witch Doctor | Support | 2nd lane item | 91 (3.5%) | +0.88 | −5.00 to +6.95 | Inconclusive |
| Magnus | Core | 3º | 229 (16.0%) | +0.83 | −3.15 to +4.50 | Inconclusive |
 Ogre Magi | Core | Lane item | 421 (24.4%) | +0.76 | −1.96 to +3.69 | Inconclusive |
| Windranger | Core | 3º | 1,097 (24.6%) | +0.71 | +0.16 to +1.26 | Inconclusive |
| Hoodwink | Support | 2nd lane item | 92 (1.1%) | +0.66 | −5.36 to +7.14 | Inconclusive |
| Magnus | Core | Lane item | 3,063 (42.2%) | +0.60 | −0.57 to +1.75 | Inconclusive |
| Slark | Support | Lane item | 70 (10.2%) | +0.56 | −3.68 to +4.59 | Inconclusive |
| Lion | Core | Lane item | 266 (14.2%) | +0.54 | −2.62 to +4.56 | Inconclusive |
| Rubick | Support | Lane item | 176 (0.9%) | +0.51 | −4.67 to +7.28 | Inconclusive |
 Snapfire | Support | Lane item | 366 (7.5%) | +0.40 | −3.24 to +3.73 | Inconclusive |
 Necrophos | Core | 3º | 622 (27.5%) | +0.33 | −1.41 to +1.92 | Inconclusive |
| Necrophos | Core | Lane item | 2,584 (18.5%) | +0.29 | −1.47 to +1.96 | Inconclusive |
 Nyx Assassin | Core | Lane item | 155 (7.7%) | +0.26 | −4.66 to +4.95 | Inconclusive |
| Earthshaker | Core | 3º | 107 (13.0%) | +0.24 | −3.42 to +3.47 | Inconclusive |
| Magnus | Support | 2nd lane item | 62 (34.3%) | +0.24 | −2.64 to +2.72 | Inconclusive |
| Winter Wyvern | Support | 2nd lane item | 88 (4.7%) | +0.22 | −5.05 to +5.50 | Inconclusive |
 Pudge | Core | Lane item | 12,486 (65.9%) | +0.19 | −0.16 to +0.64 | Inconclusive |
 Mirana | Support | Lane item | 298 (1.7%) | +0.18 | −4.12 to +4.52 | Inconclusive |
 Axe | Support | Lane item | 76 (16.1%) | +0.16 | −4.40 to +5.06 | Inconclusive |
| Night Stalker | Core | Lane item | 6,505 (63.6%) | +0.16 | −0.45 to +0.86 | Inconclusive |
 Legion Commander | Core | Lane item | 5,843 (60.1%) | +0.14 | −0.53 to +0.90 | Inconclusive |
 Dawnbreaker | Core | Lane item | 6,717 (49.3%) | +0.08 | −0.65 to +0.91 | Inconclusive |
| Wraith King | Core | Lane item | 1,855 (35.8%) | +0.02 | −1.54 to +1.90 | Inconclusive |
| Dragon Knight | Core | Lane item | 13,790 (61.7%) | −0.01 | −0.47 to +0.45 | Inconclusive |
 Grimstroke | Support | Lane item | 49 (0.8%) | −0.03 | −6.67 to +7.33 | Inconclusive |
| Pudge | Core | 2nd lane item | 7,909 (57.0%) | −0.08 | −1.14 to +1.20 | Inconclusive |
| Axe | Core | Lane item | 5,363 (47.6%) | −0.10 | −0.83 to +0.77 | Inconclusive |
| Tidehunter | Core | Lane item | 4,934 (49.8%) | −0.20 | −1.13 to +0.57 | Inconclusive |
| Legion Commander | Support | Lane item | 44 (39.6%) | −0.23 | −3.28 to +2.67 | Inconclusive |
| Outworld Devourer | Core | 2nd lane item | 303 (2.5%) | −0.25 | −4.69 to +3.13 | Inconclusive |
| Tidehunter | Core | 3º | 272 (7.0%) | −0.27 | −2.80 to +1.74 | Inconclusive |
| Windranger | Support | 3º | 125 (16.9%) | −0.36 | −3.06 to +2.09 | Inconclusive |
| Snapfire | Core | 3º | 92 (10.7%) | −0.40 | −4.83 to +3.05 | Inconclusive |
 Undying | Core | Lane item | 292 (10.2%) | −0.41 | −3.75 to +3.51 | Inconclusive |
 Spirit Breaker | Core | Lane item | 692 (51.7%) | −0.46 | −2.19 to +1.36 | Inconclusive |
| Outworld Devourer | Core | 3º | 104 (3.0%) | −0.48 | −2.26 to +1.14 | Inconclusive |
| Snapfire | Support | 2nd lane item | 188 (20.0%) | −0.53 | −4.16 to +2.24 | Inconclusive |
| Snapfire | Core | Lane item | 1,008 (17.7%) | −0.61 | −2.77 to +1.71 | Inconclusive |
| Pudge | Support | Lane item | 3,689 (13.4%) | −0.64 | −1.60 to +0.57 | Inconclusive |
 Drow Ranger | Core | Lane item | 46 (0.1%) | −0.65 | −8.43 to +5.98 | Inconclusive |
| Mirana | Support | 3º | 38 (9.3%) | −0.68 | −3.65 to +2.59 | Inconclusive |
 Crystal Maiden | Support | 2nd lane item | 415 (16.3%) | −0.73 | −4.17 to +2.53 | Inconclusive |
| Pudge | Support | 2nd lane item | 2,134 (26.6%) | −0.74 | −1.91 to +0.78 | Inconclusive |
| Earthshaker | Core | Lane item | 1,269 (15.4%) | −0.78 | −3.29 to +1.72 | Inconclusive |
| Ogre Magi | Core | 3º | 33 (13.4%) | −0.80 | −4.42 to +3.18 | Inconclusive |
| Lich | Support | Lane item | 178 (2.2%) | −0.80 | −7.06 to +3.35 | Inconclusive |
 Sven | Core | 2nd lane item | 404 (29.3%) | −0.86 | −2.13 to +0.20 | Inconclusive |
| Slark | Core | 2nd lane item | 657 (6.4%) | −0.87 | −3.78 to +1.90 | Inconclusive |
| Dawnbreaker | Core | 2nd lane item | 1,681 (13.7%) | −0.87 | −3.11 to +1.35 | Inconclusive |
| Dragon Knight | Core | 3º | 597 (4.9%) | −0.91 | −2.47 to +0.56 | Inconclusive |
| Pudge | Core | 3º | 1,729 (32.3%) | −0.97 | −4.06 to +2.16 | Inconclusive |
| Dawnbreaker | Core | 3º | 518 (7.8%) | −0.98 | −2.04 to +0.05 | Inconclusive |
| Dragon Knight | Support | Lane item | 36 (33.6%) | −1.03 | −4.62 to +2.40 | Inconclusive |
| Rubick | Core | 2nd lane item | 34 (2.7%) | −1.05 | −6.79 to +4.03 | Inconclusive |
| Wraith King | Core | 2nd lane item | 562 (19.3%) | −1.07 | −3.65 to +1.25 | Inconclusive |
| Legion Commander | Core | 2nd lane item | 1,871 (26.7%) | −1.07 | −2.84 to +0.95 | Inconclusive |
| Pudge | Support | 3º | 496 (47.3%) | −1.13 | −3.56 to +1.46 | Inconclusive |
| Spirit Breaker | Core | 2nd lane item | 219 (29.4%) | −1.20 | −5.24 to +2.42 | Inconclusive |
| Dragon Knight | Core | 2nd lane item | 3,180 (15.5%) | −1.22 | −2.83 to +0.15 | Inconclusive |
 Dark Willow | Support | 2nd lane item | 170 (2.7%) | −1.22 | −6.54 to +3.53 | Inconclusive |
| Ogre Magi | Support | 3º | 30 (43.5%) | −1.24 | −5.18 to +2.84 | Inconclusive |
| Night Stalker | Core | 2nd lane item | 2,517 (33.5%) | −1.35 | −3.16 to +0.52 | Inconclusive |
| Necrophos | Core | 2nd lane item | 2,258 (24.3%) | −1.36 | −3.01 to +0.19 | Inconclusive |
| Tidehunter | Core | 2nd lane item | 1,407 (16.8%) | −1.43 | −3.56 to +0.66 | Inconclusive |
| Sven | Core | Lane item | 2,335 (27.6%) | −1.44 | −3.23 to +0.41 | Inconclusive |
| Snapfire | Core | 2nd lane item | 369 (8.3%) | −1.44 | −5.62 to +2.17 | Inconclusive |
| Rubick | Support | 2nd lane item | 177 (2.2%) | −1.46 | −5.99 to +2.92 | Inconclusive |
| Spirit Breaker | Support | 3º | 59 (44.4%) | −1.55 | −4.18 to +1.25 | Inconclusive |
| Dark Willow | Support | 3º | 37 (20.0%) | −1.57 | −4.28 to +1.14 | Inconclusive |
| Pudge | Core | 4º+ | 55 (29.7%) | −1.57 | −5.35 to +2.23 | Inconclusive |
 Queen of Pain | Core | 2nd lane item | 64 (1.4%) | −1.57 | −8.58 to +5.85 | Inconclusive |
| Pudge | Support | 4º+ | 42 (50.6%) | −1.57 | −3.66 to +0.43 | Inconclusive |
| Magnus | Core | 2nd lane item | 1,383 (29.3%) | −1.59 | −3.19 to +0.17 | Inconclusive |
| Dawnbreaker | Support | Lane item | 57 (11.0%) | −1.63 | −5.82 to +2.54 | Inconclusive |
| Undying | Core | 3º | 66 (11.5%) | −1.64 | −3.95 to +1.19 | Inconclusive |
| Dark Willow | Support | Lane item | 139 (1.1%) | −1.70 | −6.65 to +4.34 | Inconclusive |
| Slark | Support | 2nd lane item | 36 (12.0%) | −1.75 | −5.97 to +2.16 | Inconclusive |
| Windranger | Support | 2nd lane item | 304 (4.9%) | −1.82 | −4.64 to +1.55 | Inconclusive |
| Nyx Assassin | Support | Lane item | 147 (1.9%) | −1.84 | −6.81 to +3.81 | Inconclusive |
| Shadow Shaman | Support | Lane item | 79 (1.3%) | −1.85 | −8.90 to +4.89 | Inconclusive |
| Undying | Core | 2nd lane item | 170 (7.8%) | −1.90 | −5.62 to +2.40 | Inconclusive |
| Ogre Magi | Support | Lane item | 290 (7.3%) | −1.90 | −6.06 to +2.44 | Inconclusive |
 Phantom Lancer | Core | 2nd lane item | 70 (2.6%) | −1.93 | −8.46 to +4.39 | Inconclusive |
| Nyx Assassin | Core | 2nd lane item | 93 (10.5%) | −1.96 | −7.36 to +2.39 | Inconclusive |
| Earthshaker | Support | 2nd lane item | 35 (15.9%) | −2.02 | −6.40 to +2.90 | Inconclusive |
| Bounty Hunter | Support | 2nd lane item | 86 (2.0%) | −2.13 | −6.73 to +3.72 | Inconclusive |
| Crystal Maiden | Support | Lane item | 312 (3.7%) | −2.19 | −6.67 to +1.84 | Inconclusive |
| Nyx Assassin | Support | 2nd lane item | 81 (4.1%) | −2.22 | −7.76 to +3.24 | Inconclusive |
| Phantom Lancer | Core | Lane item | 193 (1.7%) | −2.37 | −7.42 to +4.00 | Inconclusive |
| Rubick | Support | 3º | 38 (18.5%) | −2.46 | −5.35 to +0.57 | Inconclusive |
| Queen of Pain | Core | Lane item | 33 (0.5%) | −2.52 | −10.71 to +4.74 | Inconclusive |
| Crystal Maiden | Support | 3º | 61 (29.2%) | −2.59 | −5.89 to +1.30 | Inconclusive |
| Slark | Core | 3º | 43 (2.5%) | −2.63 | −6.60 to +1.23 | Inconclusive |
| Axe | Core | 3º | 197 (15.4%) | −2.66 | −8.43 to +2.01 | Inconclusive |
| Drow Ranger | Core | 2nd lane item | 32 (0.1%) | −2.69 | −9.38 to +3.88 | Inconclusive |
| Spirit Breaker | Support | 2nd lane item | 277 (16.2%) | −2.74 | −5.68 to +0.98 | Inconclusive |
| Undying | Support | 2nd lane item | 396 (29.6%) | −2.77 | −5.51 to +0.32 | Inconclusive |
| Windranger | Support | Lane item | 458 (5.1%) | −2.80 | −5.59 to +0.08 | Inconclusive |
| Axe | Support | 2nd lane item | 30 (14.9%) | −2.87 | −6.62 to +2.21 | Inconclusive |
| Ogre Magi | Core | 2nd lane item | 187 (19.6%) | −3.06 | −6.92 to +1.82 | Inconclusive |
| Undying | Support | Lane item | 417 (6.0%) | −3.17 | −6.87 to +1.12 | Inconclusive |
| Mirana | Support | 2nd lane item | 163 (1.6%) | −3.50 | −8.00 to +1.05 | Inconclusive |
| Legion Commander | Core | 3º | 257 (18.1%) | −3.55 | −7.43 to +0.79 | Inconclusive |
| Dawnbreaker | Core | 4º+ | 47 (14.8%) | −3.64 | −9.35 to +1.85 | Inconclusive |
| Undying | Support | 3º | 125 (47.2%) | −3.67 | −7.74 to +0.42 | Inconclusive |
| Grimstroke | Support | 2nd lane item | 50 (6.2%) | −3.76 | −10.12 to +2.33 | Inconclusive |
| Axe | Core | 2nd lane item | 1,644 (25.2%) | −3.83 | −5.88 to −1.71 | Inconclusive |
| Spirit Breaker | Support | Lane item | 567 (6.1%) | −3.85 | −7.73 to −0.57 | Inconclusive |
| Ogre Magi | Support | 2nd lane item | 141 (17.9%) | −4.41 | −8.59 to +1.21 | Inconclusive |
 Disruptor | Support | 2nd lane item | 115 (8.7%) | −4.66 | −9.19 to −0.42 | Inconclusive |
 Lifestealer | Core | Lane item | 951 (13.2%) | −5.03 | −7.63 to −2.55 | ✕ Worse |
| Lifestealer | Core | 2nd lane item | 236 (24.6%) | −5.47 | −8.59 to −2.79 | ✕ Worse |
| Earthshaker | Support | Lane item | 85 (4.3%) | −6.25 | −10.56 to −0.67 | Inconclusive |
 Juggernaut | Core | Lane item | 78 (0.6%) | −6.79 | −14.77 to +2.04 | Inconclusive |
 Zeus | Support | Lane item | 35 (0.7%) | −7.42 | −15.49 to +4.11 | Inconclusive |
| Disruptor | Support | Lane item | 118 (1.3%) | −7.86 | −13.38 to −1.99 | Inconclusive |
Win probability added: how much choosing an item changed the chance of winning, in percentage points, compared with what the hero usually buys in that same slot and situation. +1.0 means the choice won 1 percentage point more than the typical purchase. Unlike raw win rate, it accounts for the game state when the item was bought, so an item bought from ahead doesn't look good just because the game was already won.
1st, 2nd, 3rd and 4th+ count completed items. Components that become another item in most matches (Perseverance, Dragon Lance, Kaya) do not take a slot: the item they build into does. Boots get a card of their own.
The ✓ Better or ✕ Worse badge only appears when the effect passes the false discovery control (10%) in both ways of measuring: at the start of the decision and at the moment of purchase. Without a badge, the sign of the WPA is a trend.
Ranked (All Pick) matches parsed by OpenDota in the current patch. One model estimates the chance of winning from the game state; another, the effect of each item at the time of the decision. It is association, not causation: the model sees the game, not who is playing.