- In a 2006 study, people rated how appealing web pages looked after seeing them for 50 milliseconds, and those ratings matched later ones[1].
- Investors spend a few minutes on a deck; DocSend found under three on average in 2022[2].
- Presentation is read as evidence of how carefully a team works.
- The fixes are cheap: one brand, one idea per slide, clear titles and real product images.
The 50-millisecond judgement
Researchers led by Gitte Lindgaard at Carleton University flashed web pages at people for 50 milliseconds and asked them to rate visual appeal. The ratings were consistent with ratings given after longer viewing[1]. The study measured visual appeal, not trust or quality, but the effect it describes is familiar: we form an opinion of how something looks almost immediately, and it colours what follows.
Why investors are not immune
Investors read many decks a week. DocSend reported that average time spent per deck fell to under three minutes in 2022[2]. With that little time, presentation becomes a shortcut. A deck that is clear and consistent is easier to understand, so its argument lands. A deck that is cluttered makes the reader work, and busy readers stop working early.
Where weak first impressions come from
- No clear first line. If the cover does not say what you do, the reader has to guess.
- Mismatched design. A logo that differs between deck and website, five fonts, colours that change every slide.
- Text walls. Paragraphs on slides that nobody will read on a phone.
- Stock or placeholder images. They make the product feel imaginary.
- Numbers without context. Figures with no dates or trends look like they are hiding something.
Cheap fixes that change the impression
- Write the one-line description first and put it on the cover.
- Set one brand (colours, type, logo) and use it on the deck, site and product. See why your startup needs its own brand.
- One idea per slide, with the takeaway in the title.
- Use real product screens and photos.
- Date every number and show the trend.
None of these costs much. Together they change how quickly an investor understands you, which is most of what a first impression is.