The phrase "a perceived decline" is correct and usable in written English.
It can be used when discussing a decline that is recognized or interpreted by individuals, even if it may not be objectively measurable.
Example: "The report highlighted a perceived decline in customer satisfaction over the past year."
Alternatives: "an observed decrease" or "a noticeable downturn".
Second-wave feminists often lament a perceived decline in activism.
Indeed, in both the UK and US, the radicalisation seems to have been due to a perceived decline rather than growth of religion.
Whether this was in response to a perceived decline in quality, a politically motivated clampdown or a desire to make change for the sake of it, was never clear.
Other topics included the continued scarcity of black head coaches, a perceived decline in sportsmanship and the status of the instant replay, which Tagliabue said he liked this season while admitting that it might need some tweaking.
Influenced by French, Thai, and American fiction, authors in Vientiane produced popular works exhibiting romance and humour as well as social commentary that attacked the government as corrupt and that bemoaned a perceived decline in Lao social values.
There is concern about a perceived decline in traditional hill management.
Still, persecution and retaliatory killings were never reported as a cause for the perceived decline in the wolf population, and are not considered as threats to Ethiopian wolves elsewhere (Sillero-Zubiri and Macdonald 1997; Ashenafi et al. 2005; Marino et al. 2013).
The BBC noted "the common consensus is that The Simpsons' golden era ended after season nine", while Todd Leopold of CNN, in an article looking at its perceived decline, stated "for many fans ... the glory days are long past".
Many of Senator and possibly President Obama's close retainers and acolytes may cringe at the thought of channeling Richard Nixon -- but they will need his approach to global affairs in a time marked by the globally perceived decline of American moral, military and economic leadership.
The present study used a simple self-report measure of perceived decline in academic performance and did not examine report cards.
Check those dates against the perceived decline of the FA Cup.
